chore(deps): update gcr.io/go-containerregistry/crane docker tag to v0.21.4

Author: renovate[bot]

tekton/v0/tasks/crane-copy.yaml

@@ -18,7 +18,7 @@ spec:
       description: URL of the image where the image from source should be copied to
   steps:
     - name: copy
-      image: gcr.io/go-containerregistry/crane:v0.21.3
+      image: gcr.io/go-containerregistry/crane:v0.21.4
       args:
         - copy
         - $(params.src-image-url)