Bump pygments from 2.7.4 to 2.20.0 in /docs #19

Job	Run time
coverage / Coverage report (3.11, ubuntu-latest)	1m 40s
circular / Circular dependencies report (3.11, ubuntu-latest)	32s
release_ready / Release status (3.11, ubuntu-latest)	22s
qa / QA report (3.11, ubuntu-latest)	48s
dependencies / Dependencies report (3.11, ubuntu-latest)	18s
	3m 40s

Provide feedback