Back to every 2nd hour schedule for the bot

.github/workflows/renovate.yml

@@ -2,7 +2,7 @@ name: Renovate
 on:
   schedule:
     # Run every 2nd hour
-    - cron: '*/15 * * * *'
+    - cron: '0 */2 * * *'
 jobs:
   renovate:
     runs-on: ubuntu-latest

solr/renovate-config.js

@@ -5,8 +5,7 @@ module.exports = {
   platform: 'github',
   includeForks: false,
   repositories: [
-    'apache/solr',
-    'cominvent/solr-playground'
+    'apache/solr'
   ],
   allowedPostUpgradeCommands: ["./gradlew.*"]
 };