Minor style fixes

Author: josesimoes

README.md

@@ -145,6 +145,6 @@ Please check the header of the files in this repository, some of the code is und
 This project has adopted the code of conduct defined by the Contributor Covenant to clarify expected behaviour in our community.
 For more information see the [.NET Foundation Code of Conduct](https://dotnetfoundation.org/code-of-conduct).
 
-### .NET Foundation
+## .NET Foundation
 
 This project is supported by the [.NET Foundation](https://dotnetfoundation.org).