Bump SlimMessageBus.Host.Memory from 2.2.0 to 2.2.1 in /src

Bumps [SlimMessageBus.Host.Memory](https://github.com/zarusz/SlimMessageBus) from 2.2.0 to 2.2.1.
- [Release notes](https://github.com/zarusz/SlimMessageBus/releases)
- [Changelog](https://github.com/zarusz/SlimMessageBus/blob/master/docs/release_notes.md)
- [Commits](zarusz/SlimMessageBus@2.2.0...2.2.1)

---
updated-dependencies:
- dependency-name: SlimMessageBus.Host.Memory
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

src/Miha.Discord/Miha.Discord.csproj

@@ -12,7 +12,7 @@
     <PackageReference Include="Discord.Net" Version="3.13.0" />
     <PackageReference Include="Humanizer" Version="2.14.1" />
     <PackageReference Include="SlimMessageBus" Version="2.0.1" />
-    <PackageReference Include="SlimMessageBus.Host.Memory" Version="2.2.0" />
+    <PackageReference Include="SlimMessageBus.Host.Memory" Version="2.2.1" />
   </ItemGroup>
 
   <ItemGroup>