chore(deps): bump the pip group across 1 directory with 5 updates

Bumps the pip group with 5 updates in the /projects/fsi-quant-assistant/adk-agent directory:

| Package | From | To |
| --- | --- | --- |
| [authlib](https://github.com/authlib/authlib) | `1.6.1` | `1.6.5` |
| [filelock](https://github.com/tox-dev/py-filelock) | `3.19.1` | `3.20.1` |
| [mcp](https://github.com/modelcontextprotocol/python-sdk) | `1.12.3` | `1.23.0` |
| [starlette](https://github.com/Kludex/starlette) | `0.47.2` | `0.49.1` |
| [urllib3](https://github.com/urllib3/urllib3) | `2.5.0` | `2.6.0` |

Updates `authlib` from 1.6.1 to 1.6.5
- [Release notes](https://github.com/authlib/authlib/releases)
- [Changelog](https://github.com/authlib/authlib/blob/main/docs/changelog.rst)
- [Commits](authlib/authlib@v1.6.1...v1.6.5)

Updates `filelock` from 3.19.1 to 3.20.1
- [Release notes](https://github.com/tox-dev/py-filelock/releases)
- [Changelog](https://github.com/tox-dev/filelock/blob/main/docs/changelog.rst)
- [Commits](tox-dev/filelock@3.19.1...3.20.1)

Updates `mcp` from 1.12.3 to 1.23.0
- [Release notes](https://github.com/modelcontextprotocol/python-sdk/releases)
- [Changelog](https://github.com/modelcontextprotocol/python-sdk/blob/main/RELEASE.md)
- [Commits](modelcontextprotocol/python-sdk@v1.12.3...v1.23.0)

Updates `starlette` from 0.47.2 to 0.49.1
- [Release notes](https://github.com/Kludex/starlette/releases)
- [Changelog](https://github.com/Kludex/starlette/blob/main/docs/release-notes.md)
- [Commits](Kludex/starlette@0.47.2...0.49.1)

Updates `urllib3` from 2.5.0 to 2.6.0
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](urllib3/urllib3@2.5.0...2.6.0)

---
updated-dependencies:
- dependency-name: authlib
  dependency-version: 1.6.5
  dependency-type: indirect
  dependency-group: pip
- dependency-name: filelock
  dependency-version: 3.20.1
  dependency-type: indirect
  dependency-group: pip
- dependency-name: mcp
  dependency-version: 1.23.0
  dependency-type: indirect
  dependency-group: pip
- dependency-name: starlette
  dependency-version: 0.49.1
  dependency-type: indirect
  dependency-group: pip
- dependency-name: urllib3
  dependency-version: 2.6.0
  dependency-type: indirect
  dependency-group: pip
...

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

Change-Id: Ia2539d1d91c878ea93a7a7a57d5892d7397de54d
GitOrigin-RevId: 967cc2e3ca6c3c15900cb95726bc92053365111e

Author: dependabot[bot]