Merge pull request #58 from f-lab-edu/refactoring

CloudFront 무효화 조건문 수정

Author: orbital0m0

.github/workflows/deploy-optimized.yml

@@ -93,7 +93,7 @@ jobs:
             --cache-control "max-age=31536000,public"
           
       - name: Invalidate CloudFront
-        if: secrets.CLOUDFRONT_DISTRIBUTION_ID
+        if: ${{ secrets.CLOUDFRONT_DISTRIBUTION_ID }}
         run: |
           aws cloudfront create-invalidation \
             --distribution-id ${{ secrets.CLOUDFRONT_DISTRIBUTION_ID }} \