If you have followed all the naming conventions as per the instructions, then you won't face any issues with this recipe. However, if you have used a different name for the unit project and if you haven't used the word test somewhere in the name of project (which is the same name as the generated .dll file), then feel free to change the format in the following setting:
**\$(BuildConfiguration)\**\*whateverwordyouhaveinthenameofthedllfile*.dll
In the recipe, you used *, **, and !, which are called file matching patterns. You can learn more about the file matching patterns at https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/file-matching-patterns?view=vsts.