Fix install task typo (#167)

* Update for Darwin 24

Mac OS 15 support in the Gemfile.lock.

* Fix typo in install task description

We are installing CSS dependencies.

Author: mec

Gemfile.lock

@@ -199,6 +199,7 @@ PLATFORMS
   arm64-darwin-20
   arm64-darwin-21
   arm64-darwin-22
+  arm64-darwin-24
   x86_64-darwin-20
   x86_64-darwin-21
   x86_64-linux

lib/tasks/cssbundling/build.rake

@@ -1,5 +1,5 @@
 namespace :css do
-  desc "Install JavaScript dependencies"
+  desc "Install CSS dependencies"
   task :install do
     command = Cssbundling::Tasks.install_command
     unless system(command)