changelog/fragments/csv-whdescs-defaults.yaml: change to bugfixes, update descriptions (#4005)

Author: Eric Stroczynski

changelog/fragments/csv-whdescs-defaults.yaml

@@ -1,7 +1,11 @@
 entries:
   - description: >
-      Default a CSV's `spec.webhookDefinition[].admissionReviewVersions` to "v1beta1".
-    kind: addition
+      `generate <bundle|packagemanifests>` now defaults a CSV's `spec.webhookDefinition[].admissionReviewVersions`
+      to []string{"v1beta1"}, as an empty or null value is invalid.
+    kind: bugfix
+    pull_request_override: 3903
   - description: >
-      Default a CSV's `spec.webhookDefinition[].sideEffects` to "None".
-    kind: addition
+      `generate <bundle|packagemanifests>` now defaults a CSV's `spec.webhookDefinition[].sideEffects`
+      to "None", as an empty or null value is invalid.
+    kind: bugfix
+    pull_request_override: 3903