Bump ServiceStack from 4.0.56 to 5.9.2 in /src/ReactChat/ReactChat.AppWinForms#1

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dependabot/nuget/src/ReactChat/ReactChat.AppWinForms/ServiceStack-5.9.2ServiceStackApps/ReactChatApps:dependabot/nuget/src/ReactChat/ReactChat.AppWinForms/ServiceStack-5.9.2Copy head branch name to clipboard