Fixing path to builder and validator specs (#73)

* Fixing path to builder and validator specs

Since it was separated into different folders (bellatrix and capella) we can't link directly to a single file

* Update README.md

* Update README.md

---------

Co-authored-by: Alex Stokes <[email protected]>

Author: fredrik0x

README.md

@@ -5,10 +5,7 @@
 The Builder API is an interface for consensus layer clients to source blocks
 built by external entities.
 
-In this repository:
-* [API specification][oas-spec]
-* [Builder specification][builder-spec]
-* [Honest validator specification][validator-spec]
+In this repository is the [API specification][oas-spec] along with specifications for actors in this ecosystem broken out by fork.
 
 ### Why?
 
@@ -93,8 +90,6 @@ with real tag name from step 1.):
 
 [ci]: https://github.com/ethereum/builder-specs/workflows/CI/badge.svg
 [oas-spec]: https://ethereum.github.io/builder-specs/
-[builder-spec]: specs/builder.md
-[validator-spec]: specs/validator.md
 [pbs]: https://ethresear.ch/t/proposer-block-builder-separation-friendly-fee-market-designs/9725
 [mev-boost-ethr]: https://ethresear.ch/t/mev-boost-merge-ready-flashbots-architecture/11177
 [mev-boost]: https://github.com/flashbots/mev-boost