[clang-tools-extra] [clang-tidy][docs] Fix modernize-use-std-print docs (PR #91069)

[Mike Crowe via cfe-commits]

mikecrowe wrote:

The equivalent mistake was spotted by @5chmidti in https://github.com/llvm/llvm-project/pull/90397/files/54c325d7a5e24441adbe8036800a2f50e2ff5fa0#r1589697782 in the new use-std-format check.

https://github.com/llvm/llvm-project/pull/91069