chore: bump azure-keyvault-secrets

Bumps the all group with 1 update in the /examples/msal-python directory: [azure-keyvault-secrets](https://github.com/Azure/azure-sdk-for-python).


Updates `azure-keyvault-secrets` from 4.7.0 to 4.9.0
- [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-keyvault-secrets_4.7.0...azure-keyvault-secrets_4.9.0)

---
updated-dependencies:
- dependency-name: azure-keyvault-secrets
  dependency-version: 4.9.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: all
...

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

Author: dependabot[bot]

examples/msal-python/requirements.txt

@@ -1,4 +1,4 @@
-azure-keyvault-secrets==4.7.0
+azure-keyvault-secrets==4.9.0
 # MSAL's acquire_token_for_client() comes with built-in cache since 1.23
 # And it is safe to upgrade to any new versions in 1.x series
 msal>=1.23,<2