Bump pymdown-extensions from 10.4 to 10.5 #475

Job	Run time
build_linux (ubuntu-20.04, 3.9)	14m 4s
build_linux (ubuntu-20.04, 3.10)	13m 13s
build_linux (ubuntu-20.04, 3.11)	13m 4s
build_linux_online	40m 10s
build_linux (ubuntu-22.04, 3.9)	11m 10s
build_linux (ubuntu-22.04, 3.10)	12m 4s
build_linux (ubuntu-22.04, 3.11)	11m 29s
build_macos (macos-latest, 3.9)	20m 3s
build_macos (macos-latest, 3.10)	19m 49s
build_macos (macos-latest, 3.11)	19m 10s
build_windows (windows-latest, 3.9)	15m 28s
build_windows (windows-latest, 3.10)	18m 3s
build_windows (windows-latest, 3.11)	16m 1s
docs_check	24s
mypy_version_check	18s
pre-commit	1m 13s
deploy	0s
deploy_arm	0s
notify-complete	3s
	3h 45m 46s

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