[clang] [llvm][doc]: Merge the contents of identical entries. (PR #134089)

llvmbot wrote: @llvm/pr-subscribers-clang Author: None (YLChenZ) Changes Closes #133706. before the patch:  after the patch: ![doc-after](https://github.com/user-attachments/assets/1cff64b6-db2e-4

[clang] [llvm][doc]: Merge the contents of identical entries. (PR #134089)

https://github.com/YLChenZ created https://github.com/llvm/llvm-project/pull/134089 Closes #133706. before the patch:  after the patch: ![doc-after](https://github.com/user-attachments/assets/1cff64b6-d