Sample code links direct to a non existent file

### Type of issue

Outdated article

### Description

The links to the sample code (https://github.com/dotnet/EntityFramework.Docs/blob/main/samples/core/Testing/TestingWithoutTheDatabase/SqliteInMemoryBloggingControllerTest.cs) is invalid

### Page URL

https://learn.microsoft.com/en-us/ef/core/testing/testing-without-the-database#sqlite-in-memory

### Content source URL

https://github.com/dotnet/EntityFramework.Docs/blob/main/entity-framework/core/testing/testing-without-the-database.md

### Document Version Independent Id

81f8f42b-311c-6dbb-925a-281ef5a4e694

### Platform Id

c5fe6458-c961-cd30-47b9-79fcadddbc03

### Article author

@roji