ci: fix CI failing on bundle install

[tido64]

Description

A recent change on CI VMs broke bundle install:

bundler: failed to load command: rubocop (/usr/local/lib/ruby/gems/2.7.0/bin/rubocop)
/usr/local/lib/ruby/site_ruby/2.7.0/bundler/runtime.rb:309:in `check_for_activated_spec!': You have already activated bundler 2.2.22, but your Gemfile requires bundler 2.2.31. Since bundler is a default gem, you can either remove your dependency on it or try updating to a newer version of bundler that supports bundler as a default gem. (Gem::LoadError)

Platforms affected

• Android
• iOS
• macOS
• Windows

Test plan

CI should pass.

[github-actions]

Suggested change

	ruby-version: '3.0'
	ruby-version: "3.0"