iOS Service Extension Project references should not be case sensitive

[jefffhaynes]

For those that are not having their extension detected, ensure that the reference in your container app csproj matches the extension's project Guid exactly.

For example,

• Extension csproj has a project Guid <ProjectGuid>{15A3D6ED-A6FB-46B3-A8E3-204A609AC023}</ProjectGuid>
• Container app reference to the extension must also be <Project>15A3D6ED-A6FB-46B3-A8E3-204A609AC023</Project>

Mine was <Project>15a3d6ed-a6fb-46b3-a8e3-204a609ac023</Project>, and was not detected.

Originally posted by @dmariogatto in #30 (comment)

[Confusedfish]

I tried the above but didn't get anywhere. I did however manage to make progress by adding <IsAppExtension>true</IsAppExtension> to the project reference and that made it possible to add the second provisioning file through the UI