deps: update dependency pygments to v2.20.0 [security] (#301)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

requirements-dev.txt

@@ -89,7 +89,7 @@ pydantic-core==2.33.2
     # via pydantic
 pyflakes==3.4.0
     # via flake8
-pygments==2.19.2
+pygments==2.20.0
     # via
     #   pytest
     #   rich