Update dependency ruby to v3.4.7

Author: renovate[bot]

.github/workflows/ci.yaml

@@ -19,7 +19,7 @@ jobs:
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: '3.3'
+          ruby-version: '3.4.7'
           bundler-cache: true
         timeout-minutes: 30
       - name: Build

Gemfile

@@ -1,6 +1,6 @@
 source 'https://rubygems.org'
 
-ruby "~> 3.3.6"
+ruby "~> 3.4.0"
 
 gem "activesupport", ">= 5.2.7", :require => false
 gem "bootstrap-sass", "~> 3.x"