Bump CommunityToolkit.HighPerformance from 8.3.2 to 8.4.0

Bumps [CommunityToolkit.HighPerformance](https://github.com/CommunityToolkit/dotnet) from 8.3.2 to 8.4.0.
- [Release notes](https://github.com/CommunityToolkit/dotnet/releases)
- [Commits](CommunityToolkit/dotnet@v8.3.2...v8.4.0)

---
updated-dependencies:
- dependency-name: CommunityToolkit.HighPerformance
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Directory.Packages.props

@@ -11,7 +11,7 @@
 
     <!-- MsgPack Versions -->
     <ItemGroup>
-        <PackageVersion Include="CommunityToolkit.HighPerformance" Version="8.3.2" />
+        <PackageVersion Include="CommunityToolkit.HighPerformance" Version="8.4.0" />
         <PackageVersion Include="MessagePack" Version="2.5.192" />
         <PackageVersion Include="MessagePack.ImmutableCollection" Version="2.4.59" />
     </ItemGroup>