ci: add gomod updates to dependabot config

Signed-off-by: Anish Ramasekar <[email protected]>

Author: aramase

.github/dependabot.yml

@@ -26,3 +26,22 @@ updates:
       prefix: "chore"
     labels:
       - "ok-to-test"
+
+  - package-ecosystem: "gomod"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    commit-message:
+      prefix: "chore"
+    ignore:
+      - dependency-name: "*"
+        update-types:
+        - "version-update:semver-major"
+        - "version-update:semver-minor"
+    groups:
+      k8s:
+        patterns:
+        - "k8s.io/*"
+        - "sigs.k8s.io/*"
+    labels:
+      - "ok-to-test"