build(deps): bump python-dotenv in /solutions/enterprise-ai-agent

Bumps [python-dotenv](https://github.com/theskumar/python-dotenv) from 1.2.1 to 1.2.2.
- [Release notes](https://github.com/theskumar/python-dotenv/releases)
- [Changelog](https://github.com/theskumar/python-dotenv/blob/main/CHANGELOG.md)
- [Commits](theskumar/python-dotenv@v1.2.1...v1.2.2)

---
updated-dependencies:
- dependency-name: python-dotenv
  dependency-version: 1.2.2
  dependency-type: direct:production
...

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Author: dependabot[bot]

solutions/enterprise-ai-agent/poetry.lock

@@ -14,7 +14,7 @@ dependencies = [
     "google-cloud-aiplatform[adk,agent-engines]>=1.126.1",
     "google-genai>=1.9.0",
     "pydantic>=2.10.6",
-    "python-dotenv>=1.0.1",
+    "python-dotenv>=1.2.2",
     "typing-extensions>=4.12.2",
     "google-cloud-discoveryengine (>=0.13.12,<0.14.0)",
     "google-apps-chat (>=0.6.0,<0.7.0)",