update README

Zhao Yuhang

2024-01-06 07e9440b52d74e2b21b0b1df4bb959b553670452

update README

 README.md

@@ -85,7 +85,10 @@
### Build & Install

```sh
cmake -B build \
git clone --recursive https://github.com/stdware/qwindowkit
cd qwindowkit

cmake -B build -S . \
  -Dqmsetup_DIR=<dir> \ # Optional
  -DCMAKE_INSTALL_PREFIX=/path/install \
  -G "Ninja Multi-Config"