Attempt to use a different shell (default is powershell)

Author: abelbraaksma

.github/workflows/build.yaml

@@ -17,8 +17,5 @@ jobs:
         uses: actions/setup-dotnet@v3
       # build it, test it, pack it
       - name: Run dotnet build (release)
+        shell: cmd
         run: ./build.cmd
-      - name: Result of build 2
-        run: echo "Other build exit code: %ERRORLEVEL%"
-      - name: Check build result status
-        run: exit env.ERRORLEVEL