build: use CXX_FLAGS to add flags

Setting CMAKE_CXX_FLAGS on the command line overrides the defaults
generated by CMake. We want to add flags to the compiler command line,
hence CXX_FLAGS is the correct variable.

- fix some typos
- reformat run parts to improve readability

.github/workflows/build-windows.yml

@@ -27,10 +27,10 @@ jobs:
       - name: Add msbuild to PATH
         uses: microsoft/[email protected]
 
-      - name: install node
+      - name: Install node
         uses: actions/setup-node@master
 
-      - name: Install node-gpy
+      - name: Install node-gyp
         shell: powershell
         run: |
           npm install --global node-gyp@latest
@@ -52,7 +52,12 @@ jobs:
           setup-python: false
 
       - name: Configure
-        run: cmake -B ${{ runner.temp }}/build . "-DCMAKE_CXX_FLAGS=-I${{ github.workspace }}/scrypt-windows/scrypt-1.1.6/lib" -DCMAKE_LIBRARY_PATH=${{ github.workspace }}/scrypt-windows/build/Release
+        run: >
+          cmake -B ${{ runner.temp }}/build
+          "-DCXX_FLAGS=-I${{ github.workspace }}/scrypt-windows/scrypt-1.1.6/lib"
+          "-DCMAKE_LIBRARY_PATH=${{ github.workspace }}/scrypt-windows/build/Release"
+          .
 
       - name: Build
-        run: cmake --build ${{ runner.temp }}/build
+        run: |
+          cmake --build ${{ runner.temp }}/build