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

[Samrudh Nelli via cfe-commits]

SamrudhNelli wrote:

Current render: <img width="1827" height="469" alt="screenshot-2026-02-14_03-05-05" src="https://github.com/user-attachments/assets/51187125-30a3-4b17-a3b1-c53fb39f88a4" />


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