Update dependency System.Interactive.Async to v7 (#1628)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

Directory.Packages.props

@@ -44,7 +44,7 @@
         <PackageVersion Include="YamlDotNet" Version="16.3.0" />
         <PackageVersion Include="System.Collections.Immutable" Version="9.0.13" />
         <!--        <PackageVersion Include="System.Interactive" Version="6.0.1" />-->
-        <PackageVersion Include="System.Interactive.Async" Version="6.0.3" />
+        <PackageVersion Include="System.Interactive.Async" Version="7.0.0" />
         <PackageVersion Include="Bogus" Version="35.6.5" />
         <PackageVersion Include="Microsoft.CodeCoverage" Version="17.14.1" />
         <PackageVersion Include="FakeItEasy" Version="9.0.1" />