Bump @azure/storage-blob from 12.14.0 to 12.15.0 (#2056)

Bumps [@azure/storage-blob](https://github.com/Azure/azure-sdk-for-js) from 12.14.0 to 12.15.0.
- [Release notes](https://github.com/Azure/azure-sdk-for-js/releases)
- [Changelog](https://github.com/Azure/azure-sdk-for-js/blob/main/documentation/Changelog-for-next-generation.md)
- [Commits](https://github.com/Azure/azure-sdk-for-js/compare/@azure/storage-blob_12.14.0...@azure/storage-blob_12.15.0)

---
updated-dependencies:
- dependency-name: "@azure/storage-blob"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>