Add review groups

.github/dependabot.yml

@@ -11,6 +11,9 @@ updates:
     # Check the npm registry for updates every week
     schedule:
       interval: "weekly"
+    # Add reviewers
+    reviewers:
+      - "paperless-ngx/frontend"
 
   # Enable version updates for Python
   - package-ecosystem: "pip"
@@ -20,3 +23,6 @@ updates:
     # Check for updates once a week
     schedule:
       interval: "weekly"
+    # Add reviewers
+    reviewers:
+      - "paperless-ngx/backend"