Update C# basics for .NET 9

- Remove experimental moniker from Android/iOS support.

Author: Calinou

tutorials/scripting/c_sharp/c_sharp_basics.rst

@@ -12,14 +12,14 @@ and (re)visit the :ref:`Scripting section <doc_scripting>` of the
 step-by-step tutorial.
 
 C# is a high-level programming language developed by Microsoft. In Godot,
-it is implemented with .NET 8.0.
+it is implemented with .NET 9.0.
 
 .. attention::
 
     Projects written in C# using Godot 4 currently cannot be exported to the web
     platform. To use C# on the web platform, consider Godot 3 instead.
-    Android and iOS platform support is available as of Godot 4.2, but is
-    experimental and :ref:`some limitations apply <doc_c_sharp_platforms>`.
+    Android and iOS platform support is available as of Godot 4.2, but
+    :ref:`some limitations apply <doc_c_sharp_platforms>`.
 
 .. note::
 
@@ -355,8 +355,8 @@ You can read more about this error on the `C# language reference <https://learn.
 Performance of C# in Godot
 --------------------------
 
-.. seealso:: 
-    
+.. seealso::
+
     For a performance comparison of the languages Godot supports,
     see :ref:`doc_faq_which_programming_language_is_fastest`.
 
@@ -419,8 +419,8 @@ the ``.csproj`` file located in the project root:
         ...
     </Project>
 
-As of Godot 3.2.3, Godot automatically downloads and sets up newly added NuGet
-packages the next time it builds the project.
+Godot automatically downloads and sets up newly added NuGet packages
+the next time it builds the project.
 
 Profiling your C# code
 ----------------------