Turn off the dashboard issue (#583)

For @thesayyn; kill off #57 so it stops showing up in our weekly triage
review.

---

### Changes are visible to end-users: no

### Test plan

N/A.

Author: arrdem

renovate.json

@@ -12,7 +12,7 @@
   ],
   "rebaseWhen": "never",
   "labels": ["deps"],
-  "dependencyDashboard": true,
+  "dependencyDashboard": false,
   "packageRules": [
     {
       "matchFiles": ["MODULE.bazel"],