change socket path back to /run/lighttpd/* - possibly causing issues https://github.com/pi-hole/pi-hole/issues/5131

Signed-off-by: Adam Warner <me@adamwarner.co.uk>

advanced/pihole-admin.conf

@@ -23,7 +23,7 @@ $HTTP["url"] =~ "^/admin/" {
     fastcgi.server = (
         ".php" => (
             "localhost" => (
-                "socket" => "/tmp/pihole-php-fastcgi.socket",
+                "socket" => "/run/lighttpd/pihole-php-fastcgi.socket",
                 "bin-path" => "/usr/bin/php-cgi",
                 "min-procs" => 0,
                 "max-procs" => 1,