Use keyword-only arguments in abort function

This function takes too many arguments and it is not clear which is
which at the call site otherwise.

Signed-off-by: Leandro Lucarella <[email protected]>

Author: llucax

src/frequenz/repo/config/github.py

@@ -56,6 +56,7 @@ def format(self, record: logging.LogRecord) -> str:
 
 def abort(  # pylint: disable=too-many-arguments
     message: str,
+    *,
     title: str | None = None,
     file: str | None = None,
     col: int | None = None,