Bump pygments from 2.19.2 to 2.20.0 #182

Job	Run time
py3.12-ubuntu-latest-jsonschema-rs	57s
py3.10-windows-latest-jsonschema	1m 54s
py3.14-windows-latest-jsonschema	2m 33s
py3.13-windows-latest-jsonschema-rs	1m 46s
py3.12-windows-latest-jsonschema	1m 46s
py3.12-ubuntu-latest-jsonschema	47s
py3.10-ubuntu-latest-jsonschema	50s
py3.14-ubuntu-latest-jsonschema	1m 14s
py3.11-windows-latest-jsonschema	2m 4s
py3.13-windows-latest-jsonschema	1m 48s
py3.13-ubuntu-latest-jsonschema	46s
py3.11-ubuntu-latest-jsonschema	45s
	17m 10s

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