Update Italian language

[Deltwin]

Just a few improvements for the italian language.

Description

Motivation and Context

• [ ] I have raised an issue to propose this change (required)

How Has This Been Tested?

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [x] My code follows the code style of this project.
• [x] My change requires a change to the documentation.
• [x] I have updated the documentation accordingly.
• [ ] I've read the CONTRIBUTION guide
• [ ] I have signed-off my commits with git commit -s

[jacopotediosi]

Just one thing: I see that in the PR description nothing was indicated about the tests performed. Have these translations been tested on a unit with the screen officially supported by the pwnagotchi project, the Waveshare eInk 2.13”? Do they look good, considering their length and position?