[flang-commits] [flang] [flang][docs] Replace references to f18 in the docs with flang (Part 1) (PR #163577)

[Alexis Perry-Holby via flang-commits]

https://github.com/AlexisPerry approved this pull request.

Once the fix to line 813 of flang/docs/Intrinsics.md is made, I approve these changes.

https://github.com/llvm/llvm-project/pull/163577