Preview API documentation "Relates to (a) prerelease product(s)"

**Issue description**

Every API documentation page for .NET 8 (preview) mentions the following (random example: [String Class](https://learn.microsoft.com/en-us/dotnet/api/system.string?view=net-8.0)):

> Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

The part that stands out:

> relates to prerelease product

Should be:

> relates to **a** prerelease product

Or:

> relates to prerelease product**s**

Right?

**Target framework**

- [x] .NET ~Core~
- [ ] .NET Framework
- [ ] .NET Standard