Update from from 2.8.14~ynh1 to 2.8.14~ynh3 fails (also restore fails)

[tio-trom]

Describe the bug

Full logs here - https://paste.yunohost.org/raw/owipivihug

2024-05-29 16:02:47,653: DEBUG - + /opt/rbenv/versions/discourse/bin/gem install bundler
2024-05-29 16:03:31,508: WARNING - ERROR:  Error installing bundler:
2024-05-29 16:03:31,513: WARNING -  The last version of bundler (>= 0) to support your Ruby & RubyGems was 2.4.22. Try installing it with `gem install bundler -v 2.4.22`
2024-05-29 16:03:31,514: WARNING -  bundler requires Ruby version >= 3.0.0. The current ruby version is 2.7.6.219.
2024-05-29 16:03:31,618: DEBUG - + ynh_exit_properly
2024-05-29 16:03:31,619: DEBUG - + [[ restore =~ ^install$|^upgrade$|^restore$ ]]
2024-05-29 16:03:32,139: DEBUG - + ynh_clean_setup
2024-05-29 16:03:32,139: DEBUG - + ynh_clean_check_starting
2024-05-29 16:03:32,140: DEBUG - + '[' -n '' ']'
2024-05-29 16:03:32,140: DEBUG - + '[' -n '' ']'
2024-05-29 16:03:33,143: ERROR - Could not restore discourse: An error occured inside the app restore script

• Hardware: VPS bought online...
• YunoHost version: 11.2.12
• I have access to my server: Through SSH | through the webadmin | direct access via keyboard / screen | ...
• Are you in a special context or did you perform some particular tweaking on your YunoHost instance?: no

[Salamandar]

Duplicate of #178