fix: trust iframe urls

apps/docs/docs/widgets/iframe/index.mdx

@@ -66,8 +66,6 @@ add_header Content-Security-Policy "frame-ancestors 'self' https://trusted-domai
 
 - **Wikipedia homepage:** https://en.wikipedia.org/wiki/Main_Page
 - **Any YouTube video or stream:** https://www.youtube.com/embed/dQw4w9WgXcQ?si=MWUbbG66UNTla_Ni
-- **Same-origin page:** `/path/to/page` resolves from the current Homarr origin. Root-relative URLs are useful when Homarr and
-  the embedded page share a reverse-proxy host.
 
 ### Configuration