fix(docs): disable og-image in docs app

docus 5.8.1 ships OG image components incompatible with nuxt-og-image v6
(missing renderer suffix). Disable og-image in docs rather than bumping
docus, which introduced other CI regressions.

Author: harlan-zw

docs/nuxt.config.ts

@@ -7,4 +7,7 @@ export default defineNuxtConfig({
   site: {
     name: 'npmx docs',
   },
+  ogImage: {
+    enabled: false,
+  },
 })