Upgrade to Ubuntu 22.04

- Ruby version installed with Ubuntu 22.04
```
$ ruby -v
ruby 3.0.2p107 (2021-07-07 revision 0db68f0233) [x86_64-linux-gnu]
```

Author: yahonda

README.md

@@ -27,7 +27,7 @@ That's it.
 After the installation has finished, you can access the virtual machine with
 
     host $ vagrant ssh
-    Welcome to Ubuntu 21.10 (GNU/Linux 5.13.0-19-generic x86_64)
+    Welcome to Ubuntu 22.04 LTS (GNU/Linux 5.15.0-25-generic x86_64)
     ...
     vagrant@rails-dev-box:~$
 
@@ -49,7 +49,7 @@ These can be overridden by setting the environment variables `RAILS_DEV_BOX_RAM`
 
 * Git
 
-* Ruby 2.7
+* Ruby 3.0
 
 * Bundler
 

Vagrantfile

@@ -1,7 +1,7 @@
 # -*- mode: ruby -*-
 # vi: set ft=ruby :
 Vagrant.configure('2') do |config|
-  config.vm.box      = 'ubuntu/impish64' # 21.10
+  config.vm.box      = 'ubuntu/jammy64' # 22.04
   config.vm.hostname = 'rails-dev-box'
 
   config.vm.network :forwarded_port, guest: 3000, host: 3000