Build(deps): Bump the uv group across 2 directories with 4 updates (#222)

Bumps the uv group with 2 updates in the /backend directory: [nltk](https://github.com/nltk/nltk) and [google-cloud-aiplatform](https://github.com/googleapis/python-aiplatform).
Bumps the uv group with 2 updates in the /frontend directory: [flask](https://github.com/pallets/flask) and [werkzeug](https://github.com/pallets/werkzeug).


Updates `nltk` from 3.9.1 to 3.9.2
- [Changelog](https://github.com/nltk/nltk/blob/develop/ChangeLog)
- [Commits](nltk/nltk@3.9.1...3.9.2)

Updates `google-cloud-aiplatform` from 1.124.0 to 1.133.0
- [Release notes](https://github.com/googleapis/python-aiplatform/releases)
- [Changelog](https://github.com/googleapis/python-aiplatform/blob/main/CHANGELOG.md)
- [Commits](googleapis/python-aiplatform@v1.124.0...v1.133.0)

Updates `flask` from 3.1.2 to 3.1.3
- [Release notes](https://github.com/pallets/flask/releases)
- [Changelog](https://github.com/pallets/flask/blob/main/CHANGES.rst)
- [Commits](pallets/flask@3.1.2...3.1.3)

Updates `werkzeug` from 3.1.5 to 3.1.6
- [Release notes](https://github.com/pallets/werkzeug/releases)
- [Changelog](https://github.com/pallets/werkzeug/blob/main/CHANGES.rst)
- [Commits](pallets/werkzeug@3.1.5...3.1.6)

---
updated-dependencies:
- dependency-name: nltk
  dependency-version: 3.9.2
  dependency-type: direct:production
  dependency-group: uv
- dependency-name: google-cloud-aiplatform
  dependency-version: 1.133.0
  dependency-type: indirect
  dependency-group: uv
- dependency-name: flask
  dependency-version: 3.1.3
  dependency-type: indirect
  dependency-group: uv
- dependency-name: werkzeug
  dependency-version: 3.1.6
  dependency-type: indirect
  dependency-group: uv
...

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

Author: dependabot[bot]

backend/pyproject.toml

@@ -25,7 +25,7 @@ dependencies = [
     "markdown==3.8.2",
     "myst-parser==4.0.1",
     "nest-asyncio>=1.6.0",
-    "nltk==3.9.1",
+    "nltk==3.9.2",
     "openai==1.100.2",
     "protobuf>=5.29.6",
     "psycopg2-binary>=2.9.11",