Update registry.k8s.io/git-sync/git-sync Docker tag to v4.4.3

This MR contains the following updates:

Package	Type	Update	Change
registry.k8s.io/git-sync/git-sync		patch	v4.4.2 -> v4.4.3
registry.k8s.io/git-sync/git-sync	ironbank-docker	patch	v4.4.2 -> v4.4.3
registry.k8s.io/git-sync/git-sync	stage	patch	v4.4.2 -> v4.4.3

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