add id

.github/workflows/build.yml

@@ -31,6 +31,7 @@ jobs:
           RUSTFLAGS: '-Zprofile -Ccodegen-units=1 -Cinline-threshold=0 -Clink-dead-code -Coverflow-checks=off -Cpanic=abort -Zpanic_abort_tests'
           RUSTDOCFLAGS: '-Zprofile -Ccodegen-units=1 -Cinline-threshold=0 -Clink-dead-code -Coverflow-checks=off -Cpanic=abort -Zpanic_abort_tests'
       - uses: actions-rs/grcov@v0.1
+        id: coverage
       - name: Publish Unit Test Results
         uses: EnricoMi/publish-unit-test-result-action@v1
         if: always()