Add GitHub Code Scanning Workflow
Add GitHub Code Scanning Workflow

See https://github.blog/2020-09-30-code-scanning-is-now-available/
ASP-NET-Core-Boilerplate/Templates,ASP-NET-MVC-Boilerplate/Templates,ASP-NET-Core-Boilerplate/Templates,ASP-NET-MVC-Boilerplate/Templates,ASP-NET-Core-Boilerplate/Templates