Update to rails 8

[JorgeLeites]

Description

A small description of the overall goal behind these changes and the general components of the application that this PR will affect.

Related Tickets

Link to specific ticket on Trello/Jira/Assembla/etc. Every change should have a corresponding ticket.

Screenshots

Some screenshots of the introduced changes. This helps the reviewer understand the changes better.

Deploy notes (if applicable)

Add here if some specific action needs to be taken while deploying this functionality. Actions include running migrations, data dumps, scaling servers, etc.

Checklist

• Did you run some static analysis tools on the code? (rubocop, rails best practices, etc)
• Seriously, did you write or update tests?
• Assign one reviewer that has knowledge on the technology and one that has context of the introduced changes
• Does the branch conform to the bug/feature/fix naming?
• Do the commits follow the naming convention?
• Assign tags if applicable (stalled, WIP, etc)