build(deps): Bump ibm-cloud-sdk-core from 3.15.3 to 3.16.0

Bumps [ibm-cloud-sdk-core](https://github.com/IBM/python-sdk-core) from 3.15.3 to 3.16.0.
- [Release notes](https://github.com/IBM/python-sdk-core/releases)
- [Changelog](https://github.com/IBM/python-sdk-core/blob/main/CHANGELOG.md)
- [Commits](IBM/python-sdk-core@v3.15.3...v3.16.0)

---
updated-dependencies:
- dependency-name: ibm-cloud-sdk-core
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements.txt

@@ -1,4 +1,4 @@
-ibm_cloud_sdk_core==3.15.3
+ibm_cloud_sdk_core==3.16.0
 # dependencies of ibm_cloud_sdk_core:
 requests>=2.20,<3.0
 python_dateutil>=2.5.3,<3.0.0