Update C++ CI to include MinGW

Author: aous72

.github/workflows/ccp-workflow.yml

@@ -76,7 +76,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: cmake
-      run: cmake -G "MinGW Makefiles" -A x64 -DOJPH_ENABLE_TIFF_SUPPORT=OFF -DOJPH_BUILD_STREAM_EXPAND=ON ..
+      run: cmake -G "MinGW Makefiles" -DOJPH_ENABLE_TIFF_SUPPORT=OFF -DOJPH_BUILD_STREAM_EXPAND=ON ..
       working-directory: build
     - name: build
       run: cmake --build . --config Release
@@ -156,7 +156,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: cmake
-      run: cmake -G "MinGW Makefiles" -A x64 -DOJPH_ENABLE_TIFF_SUPPORT=OFF -DOJPH_BUILD_TESTS=ON ..
+      run: cmake -G "MinGW Makefiles" -DOJPH_ENABLE_TIFF_SUPPORT=OFF -DOJPH_BUILD_TESTS=ON ..
       working-directory: build
     - name: build
       run: cmake --build . --config Release