dependabot: Group the k8s.io/* dependency updates in single PR (#1594)

Signed-off-by: Marco Franssen <[email protected]>

Author: marcofranssen

.github/dependabot.yml

@@ -4,23 +4,35 @@ updates:
     directory: "/"
     schedule:
       interval: "monthly"
+
   - package-ecosystem: "docker"
     directory: "/cmd/fluent-manager"
     schedule:
       interval: "daily"
+
   - package-ecosystem: "docker"
     directory: "/cmd/fluent-watcher/fluentbit"
     schedule:
       interval: "daily"
+
   - package-ecosystem: "docker"
     directory: "/cmd/fluent-watcher/fluentd"
     schedule:
       interval: "daily"
+
   - package-ecosystem: "docker"
     directory: "/docs/best-practice/forwarding-logs-via-http"
     schedule:
       interval: "monthly"
+
   - package-ecosystem: "gomod"
-    directory: "/"
+    directories:
+      - "/"
+    groups:
+      k8s.io/*:
+        patterns:
+          - k8s.io/api
+          - k8s.io/apimachinery
+          - k8s.io/client-go
     schedule:
       interval: "weekly"