[clang-tools-extra] [clang-doc]: Enable horizontal wrapping on longer function definitions (PR #181417)

[Samrudh Nelli via cfe-commits]

SamrudhNelli wrote:

Current behaviour
<img width="1383" height="435" alt="image" src="https://github.com/user-attachments/assets/0adac7a2-62dc-4bb2-87d9-245ade2d5667" />


https://github.com/llvm/llvm-project/pull/181417