chore(deps): update dependency system.linq.async to 6.0.3 (#792)

This PR contains the following updates:

| Package | Change | Age | Confidence |
|---|---|---|---|
| [System.Linq.Async](https://github.com/dotnet/reactive) | `6.0.1` -> `6.0.3` | [![age](https://developer.mend.io/api/mc/badges/age/nuget/System.Linq.Async/6.0.3?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://developer.mend.io/api/mc/badges/confidence/nuget/System.Linq.Async/6.0.1/6.0.3?slim=true)](https://docs.renovatebot.com/merge-confidence/) |

Author: renovate[bot]

Directory.Packages.props

@@ -5,7 +5,7 @@
 	<ItemGroup>
 		<PackageVersion Include="DotNet.Glob" Version="3.1.3"/>
 		<PackageVersion Include="Newtonsoft.Json" Version="13.0.3"/>
-		<PackageVersion Include="System.Linq.Async" Version="6.0.1"/>
+		<PackageVersion Include="System.Linq.Async" Version="6.0.3"/>
 		<PackageVersion Include="System.IO.Compression" Version="4.3.0"/>
 		<PackageVersion Include="System.IO.FileSystem.AccessControl" Version="5.0.0"/>
 	</ItemGroup>