Fix broken links in 01-plutus.mdx -

Author: olgahryniuk

docs/developer-resources/05-smart-contracts/01-plutus.mdx

@@ -8,8 +8,8 @@ sidebar_position: 1
 
 To start developing with Plutus, see:
 
-- [Plutus Core documentation](https://plutus.readthedocs.io/en/latest/index.html)
-- [Developer portal Plutus overview](https://developers.cardano.org/docs/smart-contracts/plutus)
+- [Plutus Core documentation](https://plutus.cardano.intersectmbo.org/docs/)
+- [Developer portal Plinth overview](https://developers.cardano.org/docs/smart-contracts/plinth)
 - 'Plutus resources' below for more details.
 
 :::
@@ -144,39 +144,32 @@ explanations, tutorials, how-to guides, etc.
 **Documentation**:
 
 - [Plutus Core and Plutus Tx user guide](https://plutus.readthedocs.io/en/latest/):
-  introduces the Plutus Core programming language and programming with Plutus
-  Tx. Documentation includes explanations, tutorials, how-to instructions,
+  introduces the Plutus Core programming language and programming with Plinth. Documentation includes explanations, tutorials, how-to instructions,
   troubleshooting, and reference information:
 
-  - [explanations](https://plutus.readthedocs.io/en/latest/explanations/index.html)
-  - [tutorials](https://plutus.readthedocs.io/en/latest/tutorials/index.html)
-  - [how-to guides](https://plutus.readthedocs.io/en/latest/howtos/index.html)
-  - [troubleshooting](https://plutus.readthedocs.io/en/latest/troubleshooting.html)
-  - [reference](https://plutus.readthedocs.io/en/latest/reference/index.html)
-
 - [Video presentation on the Plutus Platform](https://www.youtube.com/watch?v=usMPt8KpBeI&feature=youtu.be):
   in this session from the 2020 Cardano Summit, Michael Peyton-Jones walks us
   through working with Plutus, while Jann Müller then takes us through the
   Plutus Application Platform, where assets can be built and launched. He also
   demonstrates how tokens can be transferred using a smart contract.
 
-## Plutus Pioneer Program
+## Plutus Pioneer program
 
-- [Plutus Pioneer Program](https://github.com/input-output-hk/plutus-pioneer-program#readme):
+- [Plutus Pioneer program](https://github.com/input-output-hk/plutus-pioneer-program#readme):
   includes lectures, examples, and exercises
-- [Plutus Pioneer Program notes and documentation](https://plutus-pioneer-program.readthedocs.io/en/latest/)
+- [Plutus Pioneer program notes and documentation](https://plutus-pioneer-program.readthedocs.io/en/latest/)
 - ['plutus-pioneer-program' questions on Cardano Stack Exchange](https://cardano.stackexchange.com/questions/tagged/plutus-pioneer-program)
 - [Plutus Pioneer Discord](https://discord.com/channels/826816523368005654/826836848520200233)
 
 **Plutus Pioneer community notes**:
 
-- [How to prepare for the Plutus Pioneer Program](https://www.essentialcardano.io/article/how-to-prepare-for-the-plutus-pioneer-program)
-- [Essential Resources and Documentation for the Plutus Pioneer Program](https://www.essentialcardano.io/article/essential-resources-and-documentation-for-the-plutus-pioneer-program)
-- [Plutus Pioneer Program Part 1: Understanding the eUTXO Model and Coding the first Smart Contract](https://www.essentialcardano.io/article/plutus-pioneer-program-part-1-understanding-the-eutxo-model-and-coding-the-first-smart-contract)
-- [Plutus Pioneer Program - Part 2: How to “deploy” a Smart Contract in Cardano](https://www.essentialcardano.io/article/plutus-pioneer-program-part-2-how-to-deploy-a-smart-contract-in-cardano)
-- [Plutus Pioneer Program - Part 3: How to Mint and Burn Tokens and NFTs in Cardano](https://www.essentialcardano.io/article/plutus-pioneer-program-part-3-how-to-mint-and-burn-tokens-and-nfts-in-cardano)
-- [Plutus Pioneer Program - Part 4: State Machine with Plutus (1/2)](https://www.essentialcardano.io/article/plutus-pioneer-program-part-4-state-machine-with-plutus-12)
-- [Plutus Pioneer Program - Part 5: State Machine with Plutus (2/2)](https://www.essentialcardano.io/article/plutus-pioneer-program-part-5-state-machine-with-plutus-22)
+- [How to prepare for the Plutus Pioneer program](https://www.essentialcardano.io/article/how-to-prepare-for-the-plutus-pioneer-program)
+- [Essential resources and documentation for the Plutus Pioneer program](https://www.essentialcardano.io/article/essential-resources-and-documentation-for-the-plutus-pioneer-program)
+- [Plutus Pioneer program part 1: understanding the EUTXO model and coding the first smart contract](https://www.essentialcardano.io/article/plutus-pioneer-program-part-1-understanding-the-eutxo-model-and-coding-the-first-smart-contract)
+- [Plutus Pioneer program - part 2: how to 'deploy' a smart contract on Cardano](https://www.essentialcardano.io/article/plutus-pioneer-program-part-2-how-to-deploy-a-smart-contract-in-cardano)
+- [Plutus Pioneer program - part 3: how to mint and burn tokens and NFTs on Cardano](https://www.essentialcardano.io/article/plutus-pioneer-program-part-3-how-to-mint-and-burn-tokens-and-nfts-in-cardano)
+- [Plutus Pioneer program - part 4: state machine with Plutus (1/2)](https://www.essentialcardano.io/article/plutus-pioneer-program-part-4-state-machine-with-plutus-12)
+- [Plutus Pioneer program - part 5: state machine with Plutus (2/2)](https://www.essentialcardano.io/article/plutus-pioneer-program-part-5-state-machine-with-plutus-22)
 
 ## Plutus community resources