Add redirect

Author: JoelMarcey

src/redirect.rs

@@ -53,6 +53,10 @@ static EXTERNAL_REDIRECTS: &[(&str, &str)] = &[
         "policies/privacy",
         "https://foundation.rust-lang.org/policies/privacy-policy/",
     ),
+    (
+        "policies/media-guide",
+        "https://foundation.rust-lang.org/policies/logo-policy-and-media-guide/",
+    ),
 ];
 
 // Translations present on www.rust-lang.org before the 2018 redesign. If an equivalent translation