Bump the requirements group across 1 directory with 2 updates

Bumps the requirements group with 2 updates in the / directory: [azure-storage-blob](https://github.com/Azure/azure-sdk-for-python) and [pymongo](https://github.com/mongodb/mongo-python-driver).


Updates `azure-storage-blob` from 12.21.0 to 12.23.0
- [Release notes](https://github.com/Azure/azure-sdk-for-python/releases)
- [Changelog](https://github.com/Azure/azure-sdk-for-python/blob/main/doc/esrp_release.md)
- [Commits](Azure/azure-sdk-for-python@azure-storage-blob_12.21.0...azure-storage-blob_12.23.0)

Updates `pymongo` from 4.8.0 to 4.9.1
- [Release notes](https://github.com/mongodb/mongo-python-driver/releases)
- [Changelog](https://github.com/mongodb/mongo-python-driver/blob/master/doc/changelog.rst)
- [Commits](mongodb/mongo-python-driver@4.8.0...4.9.1)

---
updated-dependencies:
- dependency-name: azure-storage-blob
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: requirements
- dependency-name: pymongo
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: requirements
...

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

requirements_dev_optional.txt

@@ -7,11 +7,11 @@ ipywidgets==8.1.5
 # optional library requirements for services
 # don't let pyup change pinning for azure-storage-blob, need to pin to older
 # version to get compatibility with azure storage emulator on appveyor (FIXME)
-azure-storage-blob==12.21.0 # pyup: ignore
+azure-storage-blob==12.23.0 # pyup: ignore
 redis==5.0.8
 types-redis
 types-setuptools
-pymongo==4.8.0
+pymongo==4.9.1
 # optional test requirements
 coverage
 pytest-cov==5.0.0