Replace occurrences of Ruby 3.3 with Ruby 3.4

Author: Uaitt

.rubocop.yml

@@ -13,7 +13,7 @@ AllCops:
     - !ruby/regexp /(vendor|bundle|bin|db/(migrate/|schema\.rb|downloads_schema\.rb)|tmp|server)($|\/.*)/
   DisplayCopNames: true
   DisplayStyleGuide: true
-  TargetRubyVersion: 3.3
+  TargetRubyVersion: 3.4
   NewCops: enable
 
 Rails:

CONTRIBUTING.md

@@ -114,7 +114,7 @@ Follow the instructions below on how to install Bundler and setup the database.
 
 ### Installing ruby, gem dependencies, and setting up the database
 
-* Use Ruby 3.3.x
+* Use Ruby 3.4.x
   * See: [Ruby install instructions](https://www.ruby-lang.org/en/downloads/).
   * `.ruby-version` is present and can be used.
 * Use Rubygems 3.5.x