[clang-tools-extra] [clang-tidy] use upper case letters for bool conversion suffix (PR #102831)

[Carlos Galvez via cfe-commits]

carlosgalvezp wrote:

> An inconsistency is that readability-uppercase-literal-suffix only handles l and u by default whereas the check here also handles f

Actually `readability-uppercase-literal-suffix` does handle `f` as well so I'm not sure I understand this comment.

https://github.com/llvm/llvm-project/pull/102831