FIX!: update ruby verion (3.1.2 instead off 3.0.3)

requires a DS software version
greater than or equal to 2022-04-13-01
see: https://github.com/betagouv/demarches-simplifiees.fr/releases/tag/2022-04-13-01


Refs: #35

manifests/default.pp

@@ -210,7 +210,7 @@ class { 'rbenv':
   owner       => $_system_username,
 }
 rbenv::plugin { 'rbenv/ruby-build': }
--> rbenv::build { '3.0.3': global => true }
+-> rbenv::build { '3.1.2': global => true }
 
 # Ensure permissions on /usr/bin/env
 -> file { '/usr/bin/env':