use json5 renovate config format

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

renovate.json

@@ -1,6 +0,0 @@
-{
-    "$schema": "https://docs.renovatebot.com/renovate-schema.json",
-    "extends": [
-        "config:recommended"
-    ]
-}

renovate.json5

@@ -0,0 +1,11 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": [
+    "config:recommended"
+  ],
+  "timezone": "Europe/Berlin",
+  "labels": [
+    "dependencies",
+    "3. to review"
+  ],
+}