Remove actions/cache@v4 from GithubActions

.github/workflows/ci.yml

@@ -14,6 +14,7 @@ on:
 jobs:
   rspec:
     runs-on: ubuntu-latest
+
     strategy:
       fail-fast: false
       matrix:
@@ -23,6 +24,7 @@ jobs:
           - '3.1'
           - '3.0'
           - 'head'
+
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -32,14 +34,6 @@ jobs:
         with:
           ruby-version: ${{ matrix.ruby }}
 
-      - name: Setup Ruby cache
-        uses: actions/cache@v4
-        with:
-          path: vendor/bundle
-          key: ${{ runner.os }}-gems-${{ matrix.ruby }}-${{ hashFiles('**/Gemfile.lock') }}
-          restore-keys: |
-            ${{ runner.os }}-gems-${{ matrix.ruby }}-
-
       - name: Bundle
         run: |
           gem install bundler