Fix links in README.md

README.md

@@ -6,7 +6,7 @@
 
 ## This is GATE10 **beta** version. The first non-beta release will be officially announced ~in the summer~ autumn 2024.
 
-See the [User Guide](https://opengate-python.readthedocs.io/en/latest/user_guide.html). The current version uses [Geant4 11.2.1](https://geant4.web.cern.ch).
+See the [User Guide](https://opengate-python.readthedocs.io/en/latest/user_guide/index.html). The current version uses [Geant4 11.2.1](https://geant4.web.cern.ch).
 
 
 ### How to install (short version)
@@ -70,7 +70,7 @@ The test history can be visualized here: https://opengate.github.io/opengate_tes
 
 ### How to install (long version, for developers)
 
-See the [developer guide](https://opengate-python.readthedocs.io/en/latest/developer_guide.html#installation-for-developers)
+See the [developer guide](https://opengate-python.readthedocs.io/en/latest/developer_guide/index.html#installation-for-developers)
 
 
 ## Included third party C++ libraries