Bump the ruby version used in github workflows

Author: younata

.github/workflows/carthage.yml

@@ -18,6 +18,6 @@ jobs:
       - uses: actions/checkout@v4
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 2.7
+          ruby-version: 3.3
           bundler-cache: true
       - run: ./test carthage 

.github/workflows/cocoapods.yml

@@ -18,6 +18,6 @@ jobs:
       - uses: actions/checkout@v4
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 2.7
+          ruby-version: 3.3
           bundler-cache: true
       - run: ./test podspec