build(deps): bump google-cloud-aiplatform from 1.132.0 to 1.139.0

Bumps [google-cloud-aiplatform](https://github.com/googleapis/python-aiplatform) from 1.132.0 to 1.139.0.
- [Release notes](https://github.com/googleapis/python-aiplatform/releases)
- [Changelog](https://github.com/googleapis/python-aiplatform/blob/main/CHANGELOG.md)
- [Commits](googleapis/python-aiplatform@v1.132.0...v1.139.0)

---
updated-dependencies:
- dependency-name: google-cloud-aiplatform
  dependency-version: 1.139.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements.txt

@@ -4,4 +4,4 @@ ruff
 slack-cli-hooks==0.2.0
 openai==2.14.0
 anthropic==0.75.0
-google-cloud-aiplatform==1.132.0
+google-cloud-aiplatform==1.139.0