build(deps-dev): bump mypy from 2.0.0 to 2.1.0 in /pelican

Bumps [mypy](https://github.com/python/mypy) from 2.0.0 to 2.1.0.
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v2.0.0...v2.1.0)

---
updated-dependencies:
- dependency-name: mypy
  dependency-version: 2.1.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

pelican/pyproject.toml

@@ -70,7 +70,7 @@ dev = [
     "pelican[markdown]>=4.11,<4.12",
     "ruff>=0.15.12",
     "pytest>=8",
-    "mypy>=2.0.0",
+    "mypy>=2.1.0",
     "pylint>=3",
     "types-PyYAML>=6.0",
     "types-requests>=2.33.0.20260503",