ci: add forms-overview guide to forms approval list (angular#26549)

PR Close angular#26549

Author: kara

.pullapprove.yml

@@ -277,6 +277,9 @@ groups:
         - "aio/content/guide/forms.md"
         - "aio/content/examples/forms/*"
         - "aio/content/images/guide/forms/*"
+        - "aio/content/guide/forms-overview.md"
+        - "aio/content/examples/forms-overview/*"
+        - "aio/content/images/guide/forms-overview/*"
         - "aio/content/guide/form-validation.md"
         - "aio/content/examples/form-validation/*"
         - "aio/content/images/guide/form-validation/*"