use ruby 3.4.3 in CI

Author: joelhawksley

.github/workflows/ci.yml

@@ -10,7 +10,7 @@ jobs:
     - name: Setup Ruby
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: 3.0.3
+        ruby-version: 3.4.3
     - uses: actions/cache@v2
       with:
         path: vendor/bundle

.ruby-version

@@ -1 +1 @@
-3.0.3
+3.4.3

README.md

@@ -4,7 +4,7 @@ Rails application with ViewComponent, using the `https://github.com/github/view_
 
 ## Ruby version
 
-Use your favorite Ruby version manager to install `3.0.0`.
+Use your favorite Ruby version manager to install `3.4.3`.
 
 ## Local development