nixos/freshrss: add description about php-fpm

nixos/modules/services/web-apps/freshrss.nix

@@ -10,7 +10,7 @@ in
   meta.maintainers = with maintainers; [ etu stunkymonkey mattchrist ];
 
   options.services.freshrss = {
-    enable = mkEnableOption "FreshRSS feed reader";
+    enable = mkEnableOption "FreshRSS RSS aggregator and reader with php-fpm backend.";
 
     package = mkPackageOption pkgs "freshrss" { };
 
@@ -108,7 +108,7 @@ in
       type = types.str;
       default = poolName;
       description = ''
-        Name of the phpfpm pool to use and setup. If not specified, a pool will be created
+        Name of the php-fpm pool to use and setup. If not specified, a pool will be created
         with default values.
       '';
     };