upgrade `gix` from v0.62 to v0.63 for security patches #220

Job	Run time
Lint	46s
Publish Check	17s
cargo-deny	22s
Test (ubuntu-22.04, --features git)	1m 9s
Test (ubuntu-22.04, --features sparse)	49s
Test (ubuntu-22.04, --features local-builder,sparse)	55s
	4m 18s

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