CLOUD-727 group together prs of the k8s.io pattern (#1588)

Co-authored-by: Viacheslav Sarzhan <slava.sarzhan@percona.com>

Author: gkech

.github/dependabot.yml

@@ -41,4 +41,8 @@ updates:
       interval: weekly
       day: "tuesday"
       time: "01:00"
-  
+    groups:
+      k8s-ecosystem:
+        patterns:
+          - "k8s.io/*"
+          - "sigs.k8s.io/*"