[3.10] Fix typos in the Lib directory (GH-28775) (GH-28804)

Fix typos in the Lib directory as identified by codespell.

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>.
(cherry picked from commit 745c9d9dfc1ad6fdfdf1d07420c6273ff67fa5be)

Co-authored-by: Christian Clauss <cclauss@me.com>
diff --git a/Lib/distutils/ccompiler.py b/Lib/distutils/ccompiler.py
index b5ef143..4c47f2e 100644
--- a/Lib/distutils/ccompiler.py
+++ b/Lib/distutils/ccompiler.py
@@ -392,7 +392,7 @@ def _fix_compile_args(self, output_dir, macros, include_dirs):
         return output_dir, macros, include_dirs
 
     def _prep_compile(self, sources, output_dir, depends=None):
-        """Decide which souce files must be recompiled.
+        """Decide which source files must be recompiled.
 
         Determine the list of object files corresponding to 'sources',
         and figure out which ones really need to be recompiled.