ci: increase vcpus for worker

Vagrantfile

@@ -62,7 +62,7 @@ Vagrant.configure("2") do |config|
   # Reduce requirements so everythin runs on GitHub Actions
   config.vm.provider "virtualbox" do |v|
     v.memory = 1024
-    v.cpus = 1
+    v.cpus = 2
   end
 
   # Enable provisioning with a shell script. Additional provisioners such as