Bump version in demo project

Author: jongalloway

samples/Demo/NLWebNet.Demo.csproj

@@ -17,7 +17,7 @@
   </PropertyGroup>
   <ItemGroup>
     <ProjectReference Include="..\..\src\NLWebNet\NLWebNet.csproj" />  </ItemGroup><ItemGroup>
-    <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="9.0.6" />
+    <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="9.0.7" />
     <PackageReference Include="System.ServiceModel.Syndication" Version="8.0.0" />
   </ItemGroup>