Bump MessagePack from 2.5.103 to 2.5.108 (mono#336)

Bumps [MessagePack](https://github.com/neuecc/MessagePack-CSharp) from 2.5.103 to 2.5.108.
- [Release notes](https://github.com/neuecc/MessagePack-CSharp/releases)
- [Changelog](https://github.com/neuecc/MessagePack-CSharp/blob/master/prepare_release.ps1)
- [Commits](MessagePack-CSharp/MessagePack-CSharp@v2.5.103...v2.5.108)

---
updated-dependencies:
- dependency-name: MessagePack
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

src/Debugging.VisualStudio.Vsix/Debugging.VisualStudio.Vsix.csproj

@@ -41,7 +41,7 @@
     <PackageReference Include="System.Diagnostics.Tracer" Version="2.0.8" />
     <PackageReference Include="System.Reflection.Metadata" Version="7.0.1" />
     <PackageReference Include="NuGet.Build.Packaging" Version="0.2.2" PrivateAssets="all" />
-    <PackageReference Include="MessagePack" Version="2.5.103"  GeneratePathProperty="true"/>
+    <PackageReference Include="MessagePack" Version="2.5.108"  GeneratePathProperty="true"/>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="AD7Engine\AD7AsyncOperation.cs" />