fix grcov github action

Author: yngrtc

.github/workflows/grcov.yml

@@ -50,8 +50,8 @@ jobs:
           args: --lib --no-fail-fast ${{ matrix.cargo_flags }}
         env:
           CARGO_INCREMENTAL: "0"
-          RUSTFLAGS: '-Zprofile -Ccodegen-units=1 -Copt-level=0 -Clink-dead-code -Coverflow-checks=off -Zpanic_abort_tests -Cpanic=abort -Cdebug-assertions=off'
-          RUSTDOCFLAGS: '-Zprofile -Ccodegen-units=1 -Copt-level=0 -Clink-dead-code -Coverflow-checks=off -Zpanic_abort_tests -Cpanic=abort -Cdebug-assertions=off'
+          RUSTFLAGS: '-Ccodegen-units=1 -Copt-level=0 -Clink-dead-code -Coverflow-checks=off -Zpanic_abort_tests -Cpanic=abort -Cdebug-assertions=off -Cprofile-generate=target/debug'
+          RUSTDOCFLAGS: '-Ccodegen-units=1 -Copt-level=0 -Clink-dead-code -Coverflow-checks=off -Zpanic_abort_tests -Cpanic=abort -Cdebug-assertions=off -Cprofile-generate=target/debug'
 
       - name: Generate coverage data
         id: grcov
@@ -75,7 +75,7 @@ jobs:
               --service-name "GitHub Actions" \
               --service-number ${{ github.run_id }}
       - name: Upload coverage as artifact
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: lcov.info
           # path: ${{ steps.grcov.outputs.report }}