Bump RabbitMQ.Client from 6.7.0 to 6.8.1 (#577)

Bumps [RabbitMQ.Client](https://github.com/rabbitmq/rabbitmq-dotnet-client) from 6.7.0 to 6.8.1.
- [Release notes](https://github.com/rabbitmq/rabbitmq-dotnet-client/releases)
- [Changelog](https://github.com/rabbitmq/rabbitmq-dotnet-client/blob/main/CHANGELOG.md)
- [Commits](rabbitmq/rabbitmq-dotnet-client@v6.7.0...v6.8.1)

---
updated-dependencies:
- dependency-name: RabbitMQ.Client
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

src/Tingle.EventBus.Transports.RabbitMQ/Tingle.EventBus.Transports.RabbitMQ.csproj

@@ -6,7 +6,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="RabbitMQ.Client" Version="6.7.0" />
+    <PackageReference Include="RabbitMQ.Client" Version="6.8.1" />
   </ItemGroup>
 
   <ItemGroup>