Bump MessagePack from 2.5.168 to 2.5.171 (#347)

Bumps MessagePack from 2.5.168 to 2.5.171.

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

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

src/Directory.Packages.props

@@ -30,7 +30,7 @@
     </ItemGroup>
     <!--Custom Serialization Examples-->
     <ItemGroup>
-        <PackageVersion Include="MessagePack" Version="2.5.168" />
+        <PackageVersion Include="MessagePack" Version="2.5.171" />
     </ItemGroup>
     <!-- SourceLink support for all Akka.NET projects -->
     <ItemGroup>