Move to dotnet build instead of msbuild because "paths"

Author: darrelmiller

build.cmd

@@ -6,16 +6,16 @@ SET VERSION=%~1
 Echo Building Microsoft.OpenApi
 
 SET PROJ=%~dp0src\Microsoft.OpenApi\Microsoft.OpenApi.csproj 
-msbuild %PROJ% /t:restore /p:Configuration=Release
-msbuild %PROJ% /t:build /p:Configuration=Release
-msbuild %PROJ% /t:pack /p:Configuration=Release;PackageOutputPath=%~dp0artifacts;Version=%VERSION%
+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;Version=%VERSION%
 
 Echo Building Microsoft.OpenApi.Readers
 
 SET PROJ=%~dp0src\Microsoft.OpenApi.Readers\Microsoft.OpenApi.Readers.csproj 
-msbuild %PROJ% /t:restore /p:Configuration=Release
-msbuild %PROJ% /t:build /p:Configuration=Release
-msbuild %PROJ% /t:pack /p:Configuration=Release;PackageOutputPath=%~dp0artifacts;Version=%VERSION%
+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;Version=%VERSION%
 
 goto :end
 :error