update PHP

Nginx/Server Blocks/libraryofcode.org.conf

@@ -17,7 +17,7 @@ server {
      #NOTE: You should have "cgi.fix_pathinfo = 0;" in php.ini
         include fastcgi_params;
         fastcgi_intercept_errors on;
-        fastcgi_pass unix:/run/php/php7.3-fpm.sock;
+        fastcgi_pass unix:/run/php/php7.4-fpm.sock;
         #The following parameter can be also included in fastcgi_params file
         fastcgi_param  SCRIPT_FILENAME $document_root$fastcgi_script_name;
     }