fix(ci): ignore elixir updates for .drone.yml as well

renovate.json

@@ -17,9 +17,14 @@
       "matchDatasources": ["docker"]
     },
     {
-      "matchFileNames": [".tool-versions", "Dockerfile"],
+      "description": "Disable elixir updates, as renovate does not work with their <version>-otp-<version> numbering scheme.",
       "matchCurrentValue": "**-otp-**",
       "enabled": false
+    },
+    {
+      "description": "Disable erlang updates as they need to be coordinated with elixir updates.",
+      "matchDepNames": "erlang",
+      "enabled": false
     }
   ]
 }