CI: Update Clang-Cl w/ OpenMP

Update the Clang-Cl Windows runner.

.github/workflows/windows.yml

@@ -8,7 +8,7 @@ jobs:
     name: MSVC C++17 w/o Fortran w/o MPI
     runs-on: windows-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Build & Install
       run: |
         cd ExampleCodes
@@ -28,15 +28,16 @@ jobs:
     name: Clang C++17 w/o Fortran w/o MPI
     runs-on: windows-latest
     steps:
-    - uses: actions/checkout@v3
-    - uses: seanmiddleditch/gha-setup-ninja@master
+    - uses: actions/checkout@v4
     - name: Build & Install
       shell: cmd
+      env:
+        CMAKE_GENERATOR_TOOLSET: "ClangCl"
+        CMAKE_GENERATOR: "Visual Studio 17 2022"
       run: |
-        call "C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\vc\Auxiliary\build\vcvarsall.bat" x64
+        call "C:\Program Files (x86)\Microsoft Visual Studio\2022\Enterprise\vc\Auxiliary\build\vcvarsall.bat" x64
         cd ExampleCodes
         cmake -S . -B build   ^
-              -T "ClangCl"    ^
               -DCMAKE_BUILD_TYPE=Release    ^
               -DBUILD_SHARED_LIBS=ON        ^
               -DCMAKE_VERBOSE_MAKEFILE=ON   ^