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

Author: renovate[bot]

requirements_dev.txt

@@ -55,7 +55,7 @@ pydantic==2.9.2
     # via zocalo
 pydantic-core==2.23.4
     # via pydantic
-pygments==2.18.0
+pygments==2.20.0
     # via sphinx
 pytest==8.3.3
     # via