DateTime Struct for 4.8.1 Shows DateOnly and TimeOnly

### Type of issue

Other (describe below)

### Description

DateOnly and TimeOnly are not implemented in 4.8.1 and should not be shown or at least have some sort of visual warning that its not available in 4.8.1. Instead, when clicking I get bounced to Core 8 which is not intuitive.

### Page URL

https://learn.microsoft.com/en-us/dotnet/api/system.data.datacolumn.datatype?view=netframework-4.8.1

### Content source URL

https://github.com/dotnet/dotnet-api-docs/blob/main/xml/System.Data/DataColumn.xml

### Document Version Independent Id

6e83a934-5d1e-9188-13cf-cae665f05e36

### Article author

@dotnet-bot