chore: add .ruby-version file and update version in GH workflow

Author: chrispader

.github/workflows/build-ios.yml

@@ -48,7 +48,7 @@ jobs:
       - name: Setup Ruby (bundle)
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 2.7.2
+          ruby-version: 3.3.0
           bundler-cache: true
           working-directory: example/ios
 
@@ -95,7 +95,7 @@ jobs:
       - name: Setup Ruby (bundle)
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 2.7.2
+          ruby-version: 3.3.0
           bundler-cache: true
           working-directory: example/ios
 

example/.ruby-version

@@ -0,0 +1 @@
+3.3.0