⬆️ Bump System.IO.Pipelines from 5.0.1 to 6.0.3

Bumps [System.IO.Pipelines](https://github.com/dotnet/runtime) from 5.0.1 to 6.0.3.
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](dotnet/runtime@v5.0.1...v6.0.3)

---
updated-dependencies:
- dependency-name: System.IO.Pipelines
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

src/WebSocketPipe/WebSocketPipe.csproj

@@ -10,7 +10,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.1.1" PrivateAssets="all" />
-    <PackageReference Include="System.IO.Pipelines" Version="5.0.1" />
+    <PackageReference Include="System.IO.Pipelines" Version="6.0.3" />
   </ItemGroup>
 
 </Project>