Add smoke test to dependabot (#8928)

Author: eddumelendez

.github/dependabot.yml

@@ -376,6 +376,13 @@ updates:
         update-types: [ "version-update:semver-major" ]
       - dependency-name: "com.diffplug.spotless"
         update-types: [ "version-update:semver-minor" ]
+  
+  # Smoke test
+  - package-ecosystem: "gradle"
+    directory: "/smoke-test"
+    schedule:
+      interval: "weekly"
+    open-pull-requests-limit: 10
 
 # GitHub Actions
   - package-ecosystem: "github-actions"