require ruby 3.1.2 instead off ruby 3.0.3
Since DS tag [`2022-04-13-01`](https://github.com/betagouv/demarches-simplifiees.fr/releases/tag/2022-04-13-01) ruby **3.1.2**
is required instead off ruby **3.0.3**
see: [.ruby-version](https://github.com/betagouv/demarches-simplifiees.fr/blob/main/.ruby-version) file
issue