fix: Need to update boilerplate too

Signed-off-by: Chris Privitere <[email protected]>

Author: cprivitere

hack/boilerplate/boilerplate.Dockerfile.txt

@@ -1,4 +1,4 @@
-# syntax=docker/dockerfile:1.1-experimental
+# syntax=docker/dockerfile:1
 
 # Copyright YEAR The Kubernetes Authors.
 #
@@ -12,4 +12,4 @@
 # distributed under the License is distributed on an "AS IS" BASIS,
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
-# limitations under the License.
+# limitations under the License.