Update dependency System.Collections.Immutable to 9.0.11

Author: renovate[bot]

src/NetTestRegimentation.XUnit/NetTestRegimentation.XUnit.csproj

@@ -10,7 +10,7 @@
     <PackageReference Include="Microsoft.Bcl.TimeProvider" Version="8.0.1" />
     <PackageReference Include="Microsoft.Extensions.Logging.EventLog" Version="8.0.1" />
     <PackageReference Include="Microsoft.VisualStudio.Validation" Version="17.13.22" />
-    <PackageReference Include="System.Collections.Immutable" Version="9.0.9" />
+    <PackageReference Include="System.Collections.Immutable" Version="9.0.11" />
     <PackageReference Include="System.Reactive" Version="6.1.0" />
     <PackageReference Include="xunit.v3.extensibility.core" Version="3.2.0" />
   </ItemGroup>