chore(deps): update dependency microsoft.openapi to v3

Author: renovate[bot]

Directory.Packages.props

@@ -36,7 +36,7 @@
     <PackageVersion Include="Microsoft.Extensions.TimeProvider.Testing" Version="8.10.0" />
     <PackageVersion Include="Microsoft.FeatureManagement.AspNetCore" Version="4.4.0" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.0.1" />
-    <PackageVersion Include="Microsoft.OpenApi" Version="1.6.28" />
+    <PackageVersion Include="Microsoft.OpenApi" Version="3.3.1" />
     <PackageVersion Include="Microsoft.OpenApi.Readers" Version="1.6.28" />
     <PackageVersion Include="MinVer" Version="6.1.0" />
     <PackageVersion Include="Moq" Version="4.20.72" />