Fix changelogs rss probably (#23830)

(cherry picked from commit 782a6adf070ef0cc3068ed4da9e471d2d4f7c530)

Tools/actions_changelog_rss.py

@@ -112,7 +112,9 @@ def main():
             )
 
         # Copy in the stylesheet
-        template_path = pathlib.Path(__file__, 'changelogs', XSL_FILE)
+        dir_name = os.path.dirname(__file__)
+
+        template_path = pathlib.Path(dir_name, 'changelogs', XSL_FILE)
         with sftp.open(XSL_FILE, "wb") as f, open(template_path) as fh:
             f.write(fh)