Update dependency MessagePack to 2.5.198

Author: renovate[bot]

Directory.Packages.props

@@ -8,7 +8,7 @@
     <MicroBuildVersion>2.0.199</MicroBuildVersion>
   </PropertyGroup>
   <ItemGroup>
-    <PackageVersion Include="MessagePack" Version="2.5.192" />
+    <PackageVersion Include="MessagePack" Version="2.5.198" />
     <PackageVersion Include="Microsoft.VisualStudio.Composition" Version="17.12.20" />
     <PackageVersion Include="Microsoft.VisualStudio.Interop" Version="17.13.40008" />
     <PackageVersion Include="Microsoft.VisualStudio.SDK.Analyzers" Version="17.7.47" />