Bump aws-credentials from 1.11 to 1.28
Bump aws-credentials from 1.11 to 1.28

Bumps [aws-credentials](https://github.com/jenkinsci/aws-credentials-plugin) from 1.11 to 1.28.
- [Release notes](https://github.com/jenkinsci/aws-credentials-plugin/releases)
- [Commits](https://github.com/jenkinsci/aws-credentials-plugin/compare/aws-credentials-1.11...aws-credentials-1.28)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
jenkinsci/ec2-plugin,mkozell/ec2-plugin,mkozell/ec2-plugin,jenkinsci/ec2-plugin,jenkinsci/ec2-plugin,mkozell/ec2-plugin,mkozell/ec2-plugin,jenkinsci/ec2-plugin