Merge pull request #6941 from thockin/promote-git-sync

Bumpt git-sync to v4.2.4

Author: k8s-ci-robot

registry.k8s.io/images/k8s-staging-git-sync/images.yaml

@@ -1,5 +1,6 @@
 - name: git-sync
   dmap:
+    "sha256:8bfbf28623690fba06c65ec392e42023d28ecfc7e0fbfd4443388d020dc112ea": ["v4.2.4"]
     "sha256:19cc7c317d125c5737ecb9a9159d00b5d97f39c45225c6483de365d62fc09fa8": ["v4.2.3"]
     "sha256:2dc189a0886c0df1b5b0cc816c60b5fe0799230a5bb7e123aa28ff4f74ac988a": ["v4.2.2"]
     "sha256:004c213800fac0b71fa2f51979513f5fb383df713c4eaf514ddab65c9efa78b8": ["v4.2.1"]