fix: working directory 수정 #22

.github/workflows/be-ci-dev.yml

@@ -13,6 +13,11 @@ jobs:
   build:
     runs-on: ubuntu-latest
 
+    defaults:
+      run:
+        shell: bash
+        working-directory: ./backend
+
     steps:
       - name: checkout
         uses: actions/checkout@v4
@@ -24,7 +29,7 @@ jobs:
           distribution: 'temurin'
 
       - name: Grant execute permission for gradlew
-        run: chmod +x backend/gradlew
+        run: chmod +x gradlew
 
       - name: Build with Gradle
-        run: ./backend/gradlew clean build
+        run: ./gradlew clean build