[flang-commits] [flang] [Flang][OpenMP][Docs] Update target-related support in Flang docs, NFC (PR #150443)

[Tom Eccles via flang-commits]

tblah wrote:

I wonder if this should be backported to LLVM 21 so that the documentation remains correct there too?

https://github.com/llvm/llvm-project/pull/150443