message: add runtime to cache key in tests
diff: @@ -119,7 +119,7 @@ jobs:
  ~/.cargo/registry
  ~/.cargo/git
  target
  - key: ${{ runner.os }}-test-${{ hashFiles('**/Cargo.lock') }}
  + key: ${{ runner.os }}-test-${{ matrix.runtime }}-${{ hashFiles('**/Cargo.lock') }}
  - uses: taiki-e/install-action@cargo-llvm-cov
  - name: Test and gather coverage
  run: cargo llvm-cov --lcov --output-path lcov.info --features runtime-${{ matrix.runtime }}
  