Update .github/dependabot.yml

Co-authored-by: Arthit Suriyawongkul <arthit@gmail.com>
Signed-off-by: Gary O'Neall <gary@sourceauditor.com>

Author: goneall

.github/dependabot.yml

@@ -3,4 +3,6 @@ updates:
   - package-ecosystem: "maven"
     directory: "/"
     schedule:
-      interval: "weekly"
+      interval: "weekly"
+    labels:
+      - "dependencies"