refactor: CI turbo로 프론트, 백엔드 동시 수행

Author: ezcolin2

.github/workflows/ci-pipeline.yml

@@ -28,7 +28,7 @@ jobs:
         uses: actions/cache@v3
         with:
           path: node_modules
-          key: ${{ runner.os }}-backend-yarn-${{ hashFiles('yarn.lock') }}
+          key: ${{ runner.os }}-yarn-${{ hashFiles('yarn.lock') }}
 
       # turbo 의존성 설치
       - name: Install backend dependencies