chore: exclude publicca v1alpha1 (#13754)

- [ ] Regenerate this pull request now.

PiperOrigin-RevId: 746071987

Source-Link:
googleapis/googleapis@08a8380

Source-Link:
googleapis/googleapis-gen@ee29b6a
Copy-Tag:
eyJwIjoicGFja2FnZXMvZ29vZ2xlLWNsb3VkLXB1YmxpYy1jYS8uT3dsQm90LnlhbWwiLCJoIjoiZWUyOWI2YTc5ZWVmZWI2Y2U3M2JhN2QwMzA2ZTQwNWFkYWVkZmM1NSJ9

---------

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

Author: gcf-owl-bot[bot]

packages/google-cloud-public-ca/.OwlBot.yaml

@@ -16,6 +16,9 @@
 deep-remove-regex:
   - /owl-bot-staging
 
+deep-preserve-regex:
+  - /owl-bot-staging/google-cloud-public-ca/v1alpha1
+
 deep-copy-regex:
   - source: /google/cloud/security/publicca/(v.*)/.*-py
     dest: /owl-bot-staging/google-cloud-public-ca/$1