Bump aws-partitions from 1.774.0 to 1.815.0

Bumps [aws-partitions](https://github.com/aws/aws-sdk-ruby) from 1.774.0 to 1.815.0.
- [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] <[email protected]>

gems.locked

@@ -3,7 +3,7 @@ GEM
   specs:
     ast (2.4.2)
     aws-eventstream (1.2.0)
-    aws-partitions (1.774.0)
+    aws-partitions (1.815.0)
     aws-sdk-core (3.174.0)
       aws-eventstream (~> 1, >= 1.0.2)
       aws-partitions (~> 1, >= 1.651.0)