Bug 1346622 - Update /doc/troubleshooting redirect. r=IanN

src/.htaccess

@@ -22,7 +22,7 @@ Redirect permanent /dev/trademark http://www.seamonkey-project.org/legal/tradema
 RedirectMatch permanent ^/doc/2\.1/?(.*)$ http://www.seamonkey-project.org/doc/$1
 
 # flexible solution for hard-coded link in SeaMonkey Help
-Redirect temp /doc/troubleshooting http://www.seamonkey-project.org/releases/seamonkey2.1/#troubleshooting
+Redirect temp /doc/troubleshooting http://www.seamonkey-project.org/releases/seamonkey2.53.1/#troubleshooting
 
 # redirect from top level to actual location of release pages
 RedirectMatch temp ^/([0-9]{1,2}\.[0-9]{1,2}.*) http://www.seamonkey-project.org/releases/$1