Merge pull request #10118 from tetrapod00/fix-docstring

Fix docstring written as comment

Author: mhilbrunner

tutorials/scripting/gdscript/gdscript_styleguide.rst

@@ -744,7 +744,7 @@ We suggest to organize GDScript code this way:
     01. @tool
     02. class_name
     03. extends
-    04. # docstring
+    04. ## docstring
 
     05. signals
     06. enums