Fix space for other versionadded

Author: damusss

buildconfig/stubs/pygame/surface.pyi

@@ -773,7 +773,7 @@ class Surface:
         rectangle for the Surface centered at a given position. Size attributes
         such as ``size`` or ``w`` can also be applied to resize the FRect.
 
-        ..versionadded:: 2.3.0
+        .. versionadded:: 2.3.0
         """
 
     def get_bitsize(self) -> int:

docs/reST/ref/mixer.rst

@@ -526,7 +526,7 @@ The following file formats are supported
       This simply returns the channel id used to create the ``Channel`` instance
       as a read-only attribute
 
-      ..versionadded:: 2.4.0
+      .. versionadded:: 2.4.0
 
       .. ## Channel.id ##