Update mypy requirement from ~=1.20 to ~=2.1 (#1204)

Updates the requirements on [mypy](https://github.com/python/mypy) to permit the latest version.
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v1.20.0...v2.1.0)

---
updated-dependencies:
- dependency-name: mypy
  dependency-version: 2.1.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

test_bot/test-requirements.txt

@@ -1,6 +1,6 @@
 pytest~=9.0
 pytest-timeout~=2.4
 ruff~=0.15
-mypy~=1.20
+mypy~=2.1
 types-requests~=2.33
 types-PyYAML~=6.0