Bump aws/aws-sdk-php from 3.304.6 to 3.305.6

Bumps [aws/aws-sdk-php](https://github.com/aws/aws-sdk-php) from 3.304.6 to 3.305.6.
- [Release notes](https://github.com/aws/aws-sdk-php/releases)
- [Commits](aws/aws-sdk-php@3.304.6...3.305.6)

---
updated-dependencies:
- dependency-name: aws/aws-sdk-php
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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