[clang] [llvm] [docs] Fix debug and strict aliasing typo (#140071) (PR #154861)

[Justin Riddell via cfe-commits]

Arghnews wrote:

> LGTM! Do you need someone to land this on your behalf?

@AaronBallman  I do need someone to commit this, I don't have write access yes, thank you

https://github.com/llvm/llvm-project/pull/154861