workflow: update GitHub Action CI yml to use CMake's install method

.github/workflows/CI.yml

@@ -52,17 +52,13 @@ jobs:
         run: cmake --build . --config ${{ matrix.configuration }} -j $env:NUMBER_OF_PROCESSORS
       - name: Prepare artifacts
         if: matrix.configuration == 'Release'
-        run: |
-          robocopy . artifacts COPYING README.md /r:0 /w:0
-          robocopy build\bin\${{ matrix.configuration }} artifacts `
-            cxbx.exe cxbxr-ldr.exe cxbxr-emu.dll glew32.dll subhook.dll SDL2.dll `
-            cxbxr-debugger.exe capstone.dll cs_x86.dll /r:0 /w:0
-          If ($LastExitCode -le 7) { $LastExitCode = 0 }
-      - uses: actions/upload-artifact@v1
+        working-directory: build
+        run: cmake --install . --config ${{ matrix.configuration }} --prefix ../artifacts
+      - uses: actions/upload-artifact@v2
         if: matrix.configuration == 'Release'
         with:
           name: CxbxReloaded-${{ matrix.configuration }}-${{ matrix.vsver }}
-          path: artifacts
+          path: artifacts/bin/**
 
   release:
     if: |