chore: update cloud-rad version to ^0.4.0 (#731)

Source-Link: googleapis/synthtool@1063ef3
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-nodejs:latest@sha256:e92044720ab3cb6984a70b0c6001081204375959ba3599ef6c42dd99a7783a67

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: gcf-owl-bot[bot]

.github/.OwlBot.lock.yaml

@@ -13,5 +13,5 @@
 # limitations under the License.
 docker:
   image: gcr.io/cloud-devrel-public-resources/owlbot-nodejs:latest
-  digest: sha256:abc68a9bbf4fa808b25fa16d3b11141059dc757dbc34f024744bba36c200b40f
-# created: 2023-10-04T20:56:40.710775365Z
+  digest: sha256:e92044720ab3cb6984a70b0c6001081204375959ba3599ef6c42dd99a7783a67
+# created: 2023-11-10T00:24:05.581078808Z