Add a reference to readers

Author: MaggieKimani1

test/Microsoft.OpenApi.Trimming.Tests/Microsoft.OpenApi.Trimming.Tests.csproj

@@ -4,6 +4,7 @@
     <TargetFramework>net8.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
+    <PublishTrimmed>true</PublishTrimmed>
     <PublishAot>true</PublishAot>
     <TrimmerSingleWarn>false</TrimmerSingleWarn>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
@@ -14,7 +15,8 @@
   <ItemGroup>
     <ProjectReference Include="..\..\src\Microsoft.OpenApi\Microsoft.OpenApi.csproj" />
     <TrimmerRootAssembly Include="Microsoft.OpenApi" />
-    <!-- TODO: Microsoft.OpenApi.Readers has not been configured for native AoT. -->
+    <ProjectReference Include="..\..\src\Microsoft.OpenApi.Readers\Microsoft.OpenApi.Readers.csproj" />
+    <TrimmerRootAssembly Include="Microsoft.OpenApi.Readers" />
   </ItemGroup>
 
 </Project>