[GitHub] Don't indent comment that revision has passed the formatting check

Due to the way the f string was written, the text ended up with 4 spaces
at the start. 4 space indent in Markdown means plain text, which is not
what we intend here.

Author: DavidSpickett

llvm/utils/git/code-format-helper.py

@@ -131,8 +131,8 @@ def run(self, changed_files: List[str], args: FormatArgs) -> bool:
         if diff is None:
             if should_update_gh:
                 comment_text = f"""
-    :white_check_mark: With the latest revision this PR passed the {self.friendly_name}.
-    """
+:white_check_mark: With the latest revision this PR passed the {self.friendly_name}.
+"""
                 self.update_pr(comment_text, args, create_new=False)
             return True
         elif len(diff) > 0: