message: doc: Suggest using jom instead of nmake
diff: @@ -40,6 +40,8 @@ nmake
  nmake install
  ```
  +One could speed up building with [`jom`](https://wiki.qt.io/Jom), a replacement for `nmake` which makes use of all CPU cores.
  +
  To build Bitcoin Core without Qt, unload or disable the `bitcoin-qt`, `libbitcoin_qt` and `test_bitcoin-qt` projects.
  