Bump the system group with 4 updates (#560)

Bumps the system group with 4 updates: [System.Memory.Data](https://github.com/dotnet/runtime), [System.Diagnostics.DiagnosticSource](https://github.com/dotnet/runtime), [System.Text.Json](https://github.com/dotnet/runtime) and [System.Threading.Channels](https://github.com/dotnet/runtime).


Updates `System.Memory.Data` from 7.0.0 to 8.0.0
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](dotnet/runtime@v7.0.0...v8.0.0)

Updates `System.Diagnostics.DiagnosticSource` from 7.0.0 to 8.0.0
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](dotnet/runtime@v7.0.0...v8.0.0)

Updates `System.Text.Json` from 7.0.0 to 8.0.0
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](dotnet/runtime@v7.0.0...v8.0.0)

Updates `System.Threading.Channels` from 7.0.0 to 8.0.0
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](dotnet/runtime@v7.0.0...v8.0.0)

---
updated-dependencies:
- dependency-name: System.Memory.Data
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: system
- dependency-name: System.Diagnostics.DiagnosticSource
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: system
- dependency-name: System.Text.Json
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: system
- dependency-name: System.Threading.Channels
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: system
...

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

src/Tingle.EventBus.Transports.InMemory/Tingle.EventBus.Transports.InMemory.csproj

@@ -10,7 +10,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="System.Threading.Channels" Version="7.0.0" />
+    <PackageReference Include="System.Threading.Channels" Version="8.0.0" />
   </ItemGroup>
 
   <ItemGroup>

src/Tingle.EventBus/Tingle.EventBus.csproj

@@ -15,12 +15,12 @@
     <PackageReference Include="Microsoft.Extensions.Options" Version="7.0.0" />
     <PackageReference Include="Polly" Version="8.1.0" />
     <PackageReference Include="Polly.Contrib.WaitAndRetry" Version="1.1.1" />
-    <PackageReference Include="System.Memory.Data" Version="7.0.0" />
+    <PackageReference Include="System.Memory.Data" Version="8.0.0" />
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.1'">
-    <PackageReference Include="System.Diagnostics.DiagnosticSource" Version="7.0.0" />
-    <PackageReference Include="System.Text.Json" Version="7.0.0" />
+    <PackageReference Include="System.Diagnostics.DiagnosticSource" Version="8.0.0" />
+    <PackageReference Include="System.Text.Json" Version="8.0.0" />
   </ItemGroup>
 
 </Project>