Mention `WithAcceptEula` in Seq docs

[Alirexaa]

Describe the issue or suggestion

We have breaking changes in Seq. Using AddSeq does not accept eula by default. Users should use WithAcceptEula to accept eula.

Related PR: dotnet/aspire#5896

[Alirexaa]

We do not add public API for eula acceptence. We change the related package license to the related container license.