fix: GitHub Actions build-test.yml 줄바꿈으로 발생하는 에러 맞추기

Author: devwqc

.github/workflows/build-test.yml

@@ -10,10 +10,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check source branch for main PR
-      if: github.base_ref == 'main' && github.head_ref != 'develop'
-      run: |
-        echo "PRs to main branch are only allowed from develop branch"
-        exit 1
+        if: github.base_ref == 'main' && github.head_ref != 'develop'
+        run: |
+          echo "PRs to main branch are only allowed from develop branch"
+          exit 1
 
       - name: Checkout your repository using git
         uses: actions/checkout@v4