Update ci.yml

.github/workflows/ci.yml

@@ -44,7 +44,7 @@ jobs:
         env:
           GOOS: ${{ matrix.goos }}
           GOARCH: ${{ matrix.goarch }}
-          IS_PR: ${{ !!secrets.head_ref }}
+          IS_PR: ${{ !!github.head_ref }}
           CGO_ENABLED: 0
         run: |
           if [ $GOOS = "windows" ]; then export BINARY_SUFFIX="$BINARY_SUFFIX.exe"; fi
@@ -55,7 +55,7 @@ jobs:
           go build -o "output/$BINARY_NAME" -trimpath -ldflags "$LD_FLAGS" ./
       - name: Upload artifact
         uses: actions/upload-artifact@v2
-        if: ${{ !secrets.head_ref }}
+        if: ${{ !github.head_ref }}
         with:
           name: ${{ matrix.goos }}_${{ matrix.goarch }}
           path: output/