Bump proc-macro2 from 1.0.87 to 1.0.88 in the proc-macro group (#459)

Bumps the proc-macro group with 1 update: [proc-macro2](https://github.com/dtolnay/proc-macro2).


Updates `proc-macro2` from 1.0.87 to 1.0.88
- [Release notes](https://github.com/dtolnay/proc-macro2/releases)
- [Commits](dtolnay/proc-macro2@1.0.87...1.0.88)

---
updated-dependencies:
- dependency-name: proc-macro2
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: proc-macro
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]