[workflows] windows: run ninja

.github/workflows/windows_test.yml

@@ -14,7 +14,6 @@ jobs:
         shell: msys2 {0}
     env:
       COLORTERM: truecolor
-      NPROC: 2
       TERM: xterm
     name: 🏁 build, test, & install
     runs-on: windows-latest
@@ -63,7 +62,7 @@ jobs:
       - name: make
         run: |
           cd build
-          make -j${NPROC}
+          ninja
 
       - name: ctest
         run: |

README.md

@@ -477,7 +477,7 @@ If things break or seem otherwise lackluster, **please** consult the
 </details>
 
 <details>
-  <summary>Notcurses initialization locks up in MSYS2/Cygwin.</summary>
+  <summary>Notcurses exits immediately in MSYS2/Cygwin.</summary>
   Notcurses requires the [Windows ConPTY](https://devblogs.microsoft.com/commandline/windows-command-line-introducing-the-windows-pseudo-console-conpty/)
   layer. This is available in Cygwin by default since 3.2.0, but is disabled
   by default in MSYS. Launch `mintty` with `-P on` arguments, or export