Bump the pip group across 1 directory with 2 updates (#247)

Bumps the pip group with 2 updates in the / directory: [litellm](https://github.com/BerriAI/litellm) and [python-dotenv](https://github.com/theskumar/python-dotenv).


Updates `litellm` from 1.83.0 to 1.83.7
- [Release notes](https://github.com/BerriAI/litellm/releases)
- [Commits](https://github.com/BerriAI/litellm/commits)

Updates `python-dotenv` from 1.1.0 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@v1.1.0...v1.2.2)

---
updated-dependencies:
- dependency-name: litellm
  dependency-version: 1.83.7
  dependency-type: direct:production
  dependency-group: pip
- dependency-name: python-dotenv
  dependency-version: 1.2.2
  dependency-type: direct:production
  dependency-group: pip
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements.txt

@@ -1,6 +1,6 @@
-litellm==1.83.0
+litellm==1.83.7
 # openai-agents  # optional: required for examples/agentic_vectorless_rag_demo.py
 pymupdf==1.26.4
 PyPDF2==3.0.1
-python-dotenv==1.1.0
+python-dotenv==1.2.2
 pyyaml==6.0.2