[chore] Remove the renovate update for otel go (#6436)

This prevents the creation of otel go update PR from `renovate`, like
this #6434, as we would manually create an individual release PR to do
the update, like #6435.

---------

Co-authored-by: Tyler Yahn <[email protected]>

renovate.json

@@ -26,7 +26,7 @@
     },
     {
       "matchPackageNames": ["go.opentelemetry.io/otel/**"],
-      "allowedVersions": "/^v[0-9]+\\.[0-9]+\\.[0-9]+/"
+      "enabled": false
     }
   ]
 }