fix(cd): gradlew 경로 오류 수정 및 working-directory 적용

Author: sungchaewon

.github/workflows/cd.yml

@@ -32,12 +32,10 @@ jobs:
         distribution: 'temurin'
 
     - name: Grant execute permission for gradlew
-      run: chmod +x ./FixLog_Server/gradlew
+      run: chmod +x ./gradlew
 
     - name: Build with Gradle
-      run: |
-        cd FixLog_Server
-        ./gradlew clean build -x test
+      run: ./gradlew clean build -x test
 
     - name: Configure AWS credentials
       uses: aws-actions/configure-aws-credentials@v4