build

Update CHANGELOG to mention deprecation of `file()` for `files()`. #14549

Job	Run time
build (ubuntu-latest)	4m 21s
Build jj-lib without Git support	45s
Check protos	44s
cargo-deny (advisories)	23s
build (macos-13)	5m 16s
build (macos-14)	4m 39s
cargo-deny (bans licenses sources)	25s
Clippy check	2m 25s
build (windows-latest)	9m 39s
Check that MkDocs can build the docs	22s
build (ubuntu-latest, --all-features)	5m 31s
Check that MkDocs can build the docs with Poetry 1.8	21s
Check formatting	20s
	35m 11s

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