Add `@ezio-melotti` as codeowner for `.github/`. (GH-98079)

(cherry picked from commit 531ffaa7)

Co-authored-by: Ezio Melotti <ezio.melotti@gmail.com>

.github/CODEOWNERS

@@ -4,6 +4,9 @@
 # It uses the same pattern rule for gitignore file
 # https://git-scm.com/docs/gitignore#_pattern_format
 
+# GitHub
+.github/**                    @ezio-melotti
+
 # asyncio
 **/*asyncio*                  @1st1 @asvetlov