fix action deprecation

Author: mjansing

.github/workflows/ci.yml

@@ -11,15 +11,15 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Setup Ruby
         uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby }}
 
       - name: Caching dependencies
-        uses: actions/cache@v1
+        uses: actions/cache@v4
         with:
           path: vendor/bundle
           key: bundle-use-ruby-${{ runner.os }}-${{ matrix.ruby }}-${{ hashFiles('**/Gemfile.lock') }}