fix: null reference on alternate keys during hidi transform

Author: baywet

src/Microsoft.OpenApi.Hidi/Microsoft.OpenApi.Hidi.csproj

@@ -40,7 +40,7 @@
     <!-- maintaining edm on 7.X because yoko 1.X is on 7.X-->
     <PackageReference Include="Microsoft.OData.Edm" Version="7.21.6" />
     <!-- maintaining yoko to 1.X because 2.X uses oai.net 2.X -->
-    <PackageReference Include="Microsoft.OpenApi.OData" Version="1.7.4" />
+    <PackageReference Include="Microsoft.OpenApi.OData" Version="1.7.5" />
     <!-- maintaining api manifest to 0.5.6 because it's the last version with OAI.net 1.X-->
     <PackageReference Include="Microsoft.OpenApi.ApiManifest" Version="0.5.6-preview" />
     <PackageReference Include="System.CommandLine.Hosting" Version="0.4.0-alpha.22272.1" />