chore: invalidate cache for outdated run stage

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

docker-bake.hcl

@@ -89,6 +89,11 @@ target "mod-outdated" {
   inherits = ["_common"]
   dockerfile = "./hack/dockerfiles/vendor.Dockerfile"
   target = "outdated"
+  args = {
+    // used to invalidate cache for outdated run stage
+    // can be dropped when https://github.com/moby/buildkit/issues/1213 fixed
+    _RANDOM = uuidv4()
+  }
   output = ["type=cacheonly"]
 }