build

docs: downgrade `mkdocs-material` #10915

Job	Run time
build (ubuntu-latest)	3m 43s
Clippy check	2m 31s
cargo-deny (advisories)	56s
Check protos	30s
build (macos-14)	3m 16s
cargo-deny (bans licenses sources)	27s
build (windows-latest)	8m 27s
build (ubuntu-latest, --all-features)	4m 37s
Check that MkDocs can build the docs	27s
Check that MkDocs can build the docs with Poetry 1.3.2	38s
Check formatting	13s
	25m 45s

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