chore(deps-dev): bump mkdocs-material from 9.6.14 to 9.6.21 (#280) #998

Job	Run time
Lint and type checks	38s
Test Python 3.8 on ubuntu-latest	54s
Test Python 3.12 on ubuntu-latest	45s
Test Python 3.9 on ubuntu-latest	49s
Test Python 3.10 on ubuntu-latest	56s
Test Python 3.12 on windows-latest	1m 31s
Test Python 3.8 on windows-latest	2m 18s
Test Python 3.11 on ubuntu-latest	47s
Test Python 3.10 on macos-latest	1m 30s
Test Python 3.11 on windows-latest	1m 27s
Test Python 3.10 on windows-latest	1m 27s
Test Python 3.9 on macos-latest	1m 16s
Test Python 3.9 on windows-latest	1m 25s
Test Python 3.11 on macos-latest	43s
Test Python 3.12 on macos-latest	1m 6s
Test Python 3.7 on windows-latest	2m 26s
Test Python 3.7 on ubuntu-22.04	1m 4s
Test Python 3.7 on macos-13	2m 1s
Test Python 3.8 on macos-latest	1m 25s
Build assets and deploy on tags	19s
	24m 47s

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