Fixed build.cmd file

Author: darrelmiller

build.cmd

@@ -2,16 +2,16 @@
 Echo Building Microsoft.OpenApi 
 
 SET PROJ=%~dp0src\Microsoft.OpenApi\Microsoft.OpenApi.csproj 
-dotnet build %PROJ% /t:restore /p:Configuration=Release
-dotnet build %PROJ% /t:build /p:Configuration=Release
-dotnet build %PROJ% /t:pack /p:Configuration=Release;PackageOutputPath=%~dp0artifacts
+dotnet msbuild %PROJ% /t:restore /p:Configuration=Release
+dotnet msbuild %PROJ% /t:build /p:Configuration=Release
+dotnet msbuild %PROJ% /t:pack /p:Configuration=Release;PackageOutputPath=%~dp0artifacts
 
 Echo Building Microsoft.OpenApi.Readers
 
 SET PROJ=%~dp0src\Microsoft.OpenApi.Readers\Microsoft.OpenApi.Readers.csproj 
-dotnet build %PROJ% /t:restore /p:Configuration=Release
-dotnet build %PROJ% /t:build /p:Configuration=Release
-dotnet build %PROJ% /t:pack /p:Configuration=Release;PackageOutputPath=%~dp0artifacts
+dotnet msbuild %PROJ% /t:restore /p:Configuration=Release
+dotnet msbuild %PROJ% /t:build /p:Configuration=Release
+dotnet msbuild %PROJ% /t:pack /p:Configuration=Release;PackageOutputPath=%~dp0artifacts
 
 goto :end
 :error