[clang] [llvm] [RISCV] Bump Zaamo and Zalrsc to version 1.0 (PR #91556)

[Craig Topper via llvm-commits]

topperc wrote:

> > Need to update RISCVUsage.rst and ReleaseNotes.rst
> 
> Is it going to be cherry-picked to release branch?

No. We just try to update the ReleaseNotes proactively for LLVM 19.

https://github.com/llvm/llvm-project/pull/91556