Bump syn from 2.0.65 to 2.0.77 in the known_good_semver group

Bumps the known_good_semver group with 1 update: [syn](https://github.com/dtolnay/syn).


Updates `syn` from 2.0.65 to 2.0.77
- [Release notes](https://github.com/dtolnay/syn/releases)
- [Commits](dtolnay/syn@2.0.65...2.0.77)

---
updated-dependencies:
- dependency-name: syn
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: known_good_semver
...

Signed-off-by: dependabot[bot] <support@github.com>