Bump MvvmCross.Plugin.Messenger from 7.1.2 to 9.0.4#308

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developWolfteam/MiraiNotes:developfrom

dependabot/nuget/develop/MvvmCross.Plugin.Messenger-9.0.4Wolfteam/MiraiNotes:dependabot/nuget/develop/MvvmCross.Plugin.Messenger-9.0.4Copy head branch name to clipboard