Merge pull request godotengine#8556 from Calinou/update-docs-changelog-4.2

Update documentation changelog for 4.2

Author: mhilbrunner

about/docs_changelog.rst

@@ -11,6 +11,34 @@ added since version 3.0.
 .. note:: This document only contains new pages so not all changes are reflected,
           many pages have been substantially updated but are not reflected in this document.
 
+New pages since version 4.1
+---------------------------
+
+C#
+^^
+
+- :ref:`doc_c_sharp_diagnostics`
+
+Development
+^^^^^^^^^^^
+
+- :ref:`doc_2d_coordinate_systems`
+
+Migrating
+^^^^^^^^^
+
+- :ref:`doc_upgrading_to_godot_4.2`
+
+I/O
+^^^
+
+- :ref:`doc_runtime_loading_and_saving`
+
+Platform-specific
+^^^^^^^^^^^^^^^^^
+
+- :ref:`doc_android_library`
+
 New pages since version 4.0
 ---------------------------
 

tutorials/scripting/c_sharp/diagnostics/index.rst

@@ -1,3 +1,5 @@
+.. _doc_c_sharp_diagnostics:
+
 C# diagnostics
 ==============