Dalibor Mesarić

I copy/pasted the examples and got compiler errors. Then I checked FindAsync signature, and it expects ValueTask instead of Task, so I thought I could update the document, https://docs.microsoft.com/en-us/dotnet/api/microsoft.entityframeworkcore.dbcontext.findasync?view=efcore-6.0

Replace go get with go install in readme. I just started going thorugh the book and examples, and ran into some issues to I though to update the docs.