build(deps): bump @aws-sdk/s3-request-presigner in /apps/OpenSignServer

Bumps [@aws-sdk/s3-request-presigner](https://github.com/aws/aws-sdk-js-v3/tree/HEAD/packages/s3-request-presigner) from 3.896.0 to 3.908.0.
- [Release notes](https://github.com/aws/aws-sdk-js-v3/releases)
- [Changelog](https://github.com/aws/aws-sdk-js-v3/blob/main/packages/s3-request-presigner/CHANGELOG.md)
- [Commits](https://github.com/aws/aws-sdk-js-v3/commits/v3.908.0/packages/s3-request-presigner)

---
updated-dependencies:
- dependency-name: "@aws-sdk/s3-request-presigner"
  dependency-version: 3.908.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]