Add group update policy for k8s.io dependencies

Author: MartinForReal

.github/dependabot.yaml

@@ -9,6 +9,14 @@ updates:
     - "release-note-none"
     - "ok-to-test"
   open-pull-requests-limit: 1
+  groups:
+    k8s:
+      applies-to: version-updates
+      patterns:
+      - "k8s.io*"
+      update-types:
+      - "patch"
+      - "minor"
 - package-ecosystem: "github-actions"
   directory: "/"
   schedule: