[clang] [clang-format] Correctly annotate keyword operator function name (PR #66904)

[Björn Schäpers via cfe-commits]

https://github.com/HazardyKnusperkeks approved this pull request.

Sorry you have to ping. I had some downtime on my mailserver and did not receive github mails for a week.

https://github.com/llvm/llvm-project/pull/66904