Bump aws-partitions from 1.963.0 to 1.968.0 (#4522)

Bumps [aws-partitions](https://github.com/aws/aws-sdk-ruby) from 1.963.0 to 1.968.0.
- [Release notes](https://github.com/aws/aws-sdk-ruby/releases)
- [Changelog](https://github.com/aws/aws-sdk-ruby/blob/version-3/gems/aws-partitions/CHANGELOG.md)
- [Commits](https://github.com/aws/aws-sdk-ruby/commits)

---
updated-dependencies:
- dependency-name: aws-partitions
  dependency-type: indirect
  update-type: version-update:semver-minor
...

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

Gemfile.lock

@@ -137,7 +137,7 @@ GEM
     amazing_print (1.6.0)
     ast (2.4.2)
     aws-eventstream (1.3.0)
-    aws-partitions (1.963.0)
+    aws-partitions (1.968.0)
     aws-sdk-core (3.201.4)
       aws-eventstream (~> 1, >= 1.3.0)
       aws-partitions (~> 1, >= 1.651.0)