build

dependencies: bump `git2` to 0.19.0 #12532

Job	Run time
cargo-deny (advisories)	24s
Check protos	25s
Build jj-lib without Git support	47s
cargo-deny (bans licenses sources)	21s
build (ubuntu-latest)	4m 15s
build (macos-14)	4m 23s
Clippy check	2m 27s
Check that MkDocs can build the docs	24s
build (windows-latest)	7m 25s
Check that MkDocs can build the docs with Poetry 1.8	24s
build (ubuntu-latest, --all-features)	5m 10s
Check formatting	14s
	26m 39s

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