Bump syn from 1.0.72 to 1.0.73 in /oak_functions/loader
Bump syn from 1.0.72 to 1.0.73 in /oak_functions/loader

Bumps [syn](https://github.com/dtolnay/syn) from 1.0.72 to 1.0.73.
- [Release notes](https://github.com/dtolnay/syn/releases)
- [Commits](https://github.com/dtolnay/syn/compare/1.0.72...1.0.73)

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

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
project-oak/oak,project-oak/oak,project-oak/oak,project-oak/oak,project-oak/oak,project-oak/oak,project-oak/oak