message: Fix quoting for the echo line.
diff: @@ -168,7 +168,7 @@ jobs:
  chmod +x '${{ runner.tool_cache }}/cargo-sccache/bin/sccache'
  '${{ runner.tool_cache }}/cargo-sccache/bin/sccache' --start-server
  '${{ runner.tool_cache }}/cargo-sccache/bin/sccache' -s
  - echo "RUSTC_WRAPPER='${{ runner.tool_cache }}/cargo-sccache/bin/sccache'" >> $GITHUB_ENV
  + echo 'RUSTC_WRAPPER=${{ runner.tool_cache }}/cargo-sccache/bin/sccache' >> $GITHUB_ENV
  - name: Test
  run: |
  make test
  