Update ruby version in nix

Author: rien

api/Gemfile.lock

@@ -121,6 +121,7 @@ GEM
     concurrent-ruby (1.3.5)
     connection_pool (2.5.3)
     crass (1.0.6)
+    csv (3.3.5)
     daemons (1.4.1)
     date (3.4.1)
     debug (1.10.0)
@@ -327,6 +328,7 @@ DEPENDENCIES
   capistrano-rvm (~> 0.1.2)
   capistrano-yarn (~> 2.0.2)
   capistrano3-delayed-job (~> 1.7.6)
+  csv (~> 3.3, >= 3.3.5)
   debug
   delayed_job_active_record
   docker-api (~> 2.4.0)

api/shell.nix

@@ -2,7 +2,7 @@
 let
   dev = fetchTarball "https://github.com/numtide/devshell/archive/main.tar.gz";
   devshell = pkgs.devshell or (import dev { inherit system; });
-  ruby = pkgs.ruby_3_3;
+  ruby = pkgs.ruby_3_4;
 in
 devshell.mkShell {
   name = "Dolos API server";
@@ -19,7 +19,7 @@ devshell.mkShell {
     docker-compose
   ];
   language.ruby = {
-    package = (pkgs.lowPrio ruby);
+    package = ruby;
     nativeDeps = with pkgs; [ libmysqlclient libyaml ];
   };
   env = [