Use renovate json5 format

Signed-off-by: Andy Scherzinger <info@andy-scherzinger.de>

renovate.json → renovate.json5

@@ -2,5 +2,10 @@
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
   "extends": [
     "config:recommended"
-  ]
+  ],
+  "timezone": "Europe/Berlin",
+  "labels": [
+    "dependencies",
+    "3. to review"
+  ],
 }