Narrow kind/api-change auto-labeling

Author: liggitt

staging/src/k8s.io/api/OWNERS

@@ -3,10 +3,13 @@
 # Disable inheritance as this is an api owners file
 options:
   no_parent_owners: true
-approvers:
-- api-approvers
-reviewers:
-- api-reviewers
-labels:
-- sig/architecture
-- kind/api-change
+filters:
+  ".*":
+    approvers:
+      - api-approvers
+    reviewers:
+      - api-reviewers
+  # only auto-label go file changes as kind/api-change
+  "\\.go$":
+    labels:
+      - kind/api-change