Update locations of documentation

Author: tmadlener

README.md

@@ -29,7 +29,7 @@ subfolder in this repository.
 ## The instructions look a bit weird
 The instructions are in markdown (`md`) format, but they might contain `sphinx`
 specific tags since some of them are also included in the [key4hep
-website](https://key4hep.github.io/key4hep-doc/tutorials/README.html), where these allow for
+website](https://key4hep.github.io/key4hep-doc/main/tutorials/README.html), where these allow for
 a nicer rendering of additional information or the usage of more advanced
 documentation features. These tags usually start with at least three colons
 (':') and the most common one is probably

gaudi_alg_higgs/README.md

@@ -24,7 +24,7 @@ intermediate collection with the muons.
 
 First, we will need a key4hep setup, typically obtained by sourcing scripts from
 cvmfs, see the instructions
-[here](https://key4hep.github.io/key4hep-doc/setup-and-getting-started/README.html).
+[here](https://key4hep.github.io/key4hep-doc/main/setup-and-getting-started/README.html).
 After sourcing, check that the environment variable `KEY4HEP_STACK` is set to
 make sure the stack has been loaded correctly:
 

gaudi_ild_reco/README.md

@@ -136,7 +136,7 @@ files via the `--lcioOutput` flag, which can either be `off` (default), `on` or
 `only` (for not producing any EMD4hep output).
 
 Check [the introduction to EDM4hep /
-podio](https://key4hep.github.io/key4hep-doc/how-tos/key4hep-tutorials/edm4hep_analysis/edm4hep_api_intro.html)
+podio](https://key4hep.github.io/key4hep-doc/main/how-tos/key4hep-tutorials/edm4hep_analysis/edm4hep_api_intro.html)
 for more details on how to read and analyse this file.
 
 ### Creating a Gaudi options file

introduction_key4hep/README.md

@@ -122,7 +122,7 @@ Finally Marlin provides the framework to call all existing reconstruction and an
 
 
 - more Key4hep relatad talks:
-  - [https://key4hep.github.io/key4hep-doc/talks-and-presentations/README.html](https://key4hep.github.io/key4hep-doc/talks-and-presentations/README.html)
+  - [https://key4hep.github.io/key4hep-doc/main/talks-and-presentations/README.html](https://key4hep.github.io/key4hep-doc/main/talks-and-presentations/README.html)
 
 ---