[clangd] Clean formatting modernize-use-override (#81435)

When applying the recommended fix for the
"modernize-use-override" clang-tidy diagnostic
there was a stray whitespace. This PR fixes that.
Resolves https://github.com/clangd/clangd/issues/1704

GitOrigin-RevId: 5992b3272b29e071f6f5a4807a4e0c23e88c310d
4 files changed