Bump @google-cloud/functions-framework in /scripts/gcb2slack

Bumps [@google-cloud/functions-framework](https://github.com/GoogleCloudPlatform/functions-framework-nodejs) from 1.3.2 to 3.3.0.
- [Release notes](https://github.com/GoogleCloudPlatform/functions-framework-nodejs/releases)
- [Changelog](https://github.com/GoogleCloudPlatform/functions-framework-nodejs/blob/main/CHANGELOG.md)
- [Commits](GoogleCloudPlatform/functions-framework-nodejs@v1.3.2...v3.3.0)

---
updated-dependencies:
- dependency-name: "@google-cloud/functions-framework"
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>