ci(renovate): Disable renovate for the website

Disable renovate for the website project to reduce the risk for
incompatible upgrades. Instead, the Docusaurus project's dependencies
will be upgraded manually.

Signed-off-by: Martin Nonnenmacher <martin.nonnenmacher@bosch.io>

renovate.json

@@ -15,6 +15,7 @@
   ],
   "ignorePaths": [
     "plugins/reporters/web-app-template",
+    "website",
     "**/src/funTest/assets/**",
     "**/src/test/assets/**"
   ],