chore(deps): bump google-cloud-storage from 2.14.0 to 2.15.0

Bumps [google-cloud-storage](https://github.com/googleapis/python-storage) from 2.14.0 to 2.15.0.
- [Release notes](https://github.com/googleapis/python-storage/releases)
- [Changelog](https://github.com/googleapis/python-storage/blob/main/CHANGELOG.md)
- [Commits](googleapis/python-storage@v2.14.0...v2.15.0)

---
updated-dependencies:
- dependency-name: google-cloud-storage
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Pipfile

@@ -48,7 +48,7 @@ IPy = "==1.1"
 PyJWT = "==2.8.0"
 uvicorn = "==0.27.1"
 django-environ = "==0.10.0"
-google-cloud-storage = "==2.14.0"
+google-cloud-storage = "==2.15.0"
 django-storages = {extras = ["google"], version = "==1.14.2"}
 slack-sdk = "==3.27.1"