chore: tag owlbot images with infrastructure-public-image- tag (#8193)

Source-Link: googleapis/synthtool@b3920cd
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-nodejs-mono-repo:latest@sha256:af5fe933b006a4679903d4dc8e1f11e45b46c53acef70e4fd6a4b1949fab8781

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>
Co-authored-by: Gabe Pearhill <86282859+pearigee@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-mono-repo:latest
-  digest: sha256:715766c3cc3c9cee22792364d83af4b7357f36428cddc9b41ae0bc5e95fd59b1
-# created: 2026-03-28T01:31:14.274187079Z
+  digest: sha256:af5fe933b006a4679903d4dc8e1f11e45b46c53acef70e4fd6a4b1949fab8781
+# created: 2026-05-06T17:06:25.633305017Z