ci(SPV-992): use dependabot update groups

.github/dependabot.yml

@@ -1,6 +1,33 @@
 version: 2
 updates:
+  # Maintain dependencies for the codebase
   - package-ecosystem: "gomod"
+    target-branch: "main"
+    directories:
+      - "/"
+    schedule:
+      interval: "weekly"
+      day: "monday"
+    labels:
+      - "dependencies"
+    groups:
+      go_modules:
+        update-types:
+          - "minor"
+          - "patch"
+          - "major"
+  # Maintain dependencies for GitHub Actions
+  - package-ecosystem: "github-actions"
+    target-branch: "main"
     directory: "/"
     schedule:
-      interval: "daily"
+      interval: "weekly"
+      day: "monday"
+    labels:
+      - "dependencies"
+    groups:
+      gh_actions:
+        update-types:
+          - "minor"
+          - "patch"
+          - "major"