[llvm] [llvm][docs] Update the project and runtimes lists (PR #109788)

[David Spickett via llvm-commits]

DavidSpickett wrote:

Documentation build failure is unrelated:
```
Warning, treated as error:
/home/runner/work/llvm-project/llvm-project/llvm/docs/RISCVUsage.rst::Anonymous hyperlink mismatch: 1 references but 0 targets.
See "backrefs" attribute for IDs.
```
(though I will go an fix that later)

https://github.com/llvm/llvm-project/pull/109788