chore: updates oai.net reference

Author: baywet

src/Microsoft.OpenApi.OData.Reader/Microsoft.OpenAPI.OData.Reader.csproj

@@ -54,7 +54,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="Microsoft.OData.Edm" Version="8.2.3" />
-    <PackageReference Include="Microsoft.OpenApi" Version="2.0.0-preview5" />
+    <PackageReference Include="Microsoft.OpenApi" Version="2.0.0-preview6" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>

src/OoasGui/OoasGui.csproj

@@ -17,7 +17,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.CSharp" Version="4.7.0" />
     <PackageReference Include="Microsoft.OData.Edm" Version="8.2.3" />
-    <PackageReference Include="Microsoft.OpenApi" Version="2.0.0-preview5" />
+    <PackageReference Include="Microsoft.OpenApi" Version="2.0.0-preview6" />
     <PackageReference Include="System.Data.DataSetExtensions" Version="4.5.0" />
   </ItemGroup>
 </Project>

test/Microsoft.OpenAPI.OData.Reader.Tests/Microsoft.OpenAPI.OData.Reader.Tests.csproj

@@ -89,7 +89,7 @@
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
-    <PackageReference Include="Microsoft.OpenApi" Version="2.0.0-preview5" />
+    <PackageReference Include="Microsoft.OpenApi" Version="2.0.0-preview6" />
     <PackageReference Include="moq" Version="4.20.72" />
     <PackageReference Include="xunit" Version="2.9.3" />
     <PackageReference Include="xunit.runner.visualstudio" Version="3.0.1">

tool/UpdateDocs/UpdateDocs.csproj

@@ -13,6 +13,6 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.OData.Edm" Version="8.2.3" />
-    <PackageReference Include="Microsoft.OpenApi" Version="2.0.0-preview5" />
+    <PackageReference Include="Microsoft.OpenApi" Version="2.0.0-preview6" />
   </ItemGroup>
 </Project>