[.htaccess] Add rewrite rules for LATEST_VERSION and versions.json

.htaccess

@@ -14,6 +14,9 @@ RewriteRule ^g403/?$ https://github.com/ytdl-org/youtube-dl/blob/master/README.m
 RewriteRule ^format-selection/?$ https://github.com/ytdl-org/youtube-dl#format-selection [R=302,L,NE]
 RewriteRule ^output-template/?$ https://github.com/ytdl-org/youtube-dl#output-template [R=302,L,NE]
 
+RewriteRule ^update/LATEST_VERSION$ https://ytdl-org.github.io/youtube-dl/update/LATEST_VERSION [R=302,L]
+RewriteRule ^update/versions.json https://ytdl-org.github.io/youtube-dl/update/versions.json [R=302,L]
+ 
 RewriteRule ^latest/version/?$ latest_version [L,T=text/plain]
 RewriteRule ^latest_version/?$ - [T=text/plain]
 RewriteRule ^latest(?:/(.*))?$ /downloads/latest/$1 [R=302,L]