Update link for the SignalR Swift client to point to the related doc page

[danroth27]

Description

The link for the SignalR Swift client on this page currently points to the GitHub repo: https://github.com/dotnet/signalr-client-swift. Instead, it should point to the related doc page that was recently added: https://learn.microsoft.com/aspnet/core/signalr/swift-client

Page URL

https://learn.microsoft.com/en-us/aspnet/core/signalr/supported-platforms?view=aspnetcore-9.0

Content source URL

https://github.com/dotnet/AspNetCore.Docs/blob/main/aspnetcore/signalr/supported-platforms.md

Document ID

d0106767-c04e-39a8-fe1d-a40352552c62

Platform Id

c9cab887-002c-d027-38eb-b8701c0f3179

Article author

@bradygaster

Metadata

• ID: edc76539-dcd8-8271-b876-f2b492af9b49
• PlatformId: c9cab887-002c-d027-38eb-b8701c0f3179
• Service: aspnet-core
• Sub-service: aspnetcore-signalr

Related Issues

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Associated WorkItem - 416556

[danroth27]

We should probably also remove the link to the unsupported 3rd party Swift client.