[clang][docs] Move entries around (#97416)
Let's just move these under the
`Non-comprehensive list of changes in this release` section.
Resolves:
- https://github.com/llvm/llvm-project/pull/79261#issuecomment-2202950396
- https://github.com/llvm/llvm-project/pull/65484#issuecomment-2202956759
