build(deps): bump aws/aws-sdk-php from 3.306.2 to 3.308.7

Bumps [aws/aws-sdk-php](https://github.com/aws/aws-sdk-php) from 3.306.2 to 3.308.7.
- [Release notes](https://github.com/aws/aws-sdk-php/releases)
- [Commits](aws/aws-sdk-php@3.306.2...3.308.7)

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

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