[llvm] [Dexter] Sanitize user details from git repo URL in dexter --version (PR #105533)

[Orlando Cazalet-Hyams via llvm-commits]

OCHyams wrote:

nit: `darker` formatting for the new code?
https://llvm.org/docs/CodingStandards.html#python-version-and-source-code-formatting

https://github.com/llvm/llvm-project/pull/105533