Fix CI

.github/workflows/ci-server.yaml

@@ -8,15 +8,12 @@ jobs:
   server-test:
     runs-on: ubuntu-latest
     steps:
-      - run: echo "GITHUB_HEAD_REF: ${{ github.head_ref }}"
-      - run: echo "GITHUB_REF_NAME: ${{ github.ref_name }}"
-      - run: echo "GITHUB_REF: ${{ github.ref }}"
       - uses: actions/checkout@v3
-        if: github.head_ref == 'main'
+        if: github.event_name != 'pull_request_target'
         with:
           ref: ${{ github.head_ref || github.ref_name }}
       - uses: actions/checkout@v3
-        if: github.head_ref != 'main'
+        if: github.head_ref == 'pull_request_target'
         with:
           ref: "refs/pull/${{ github.event.number }}/merge"
       - name: Setup Node.js