[clang-tools-extra] [clang-tidy] Clarify diagnostics of bugprone-sizeof-expression (PR #95550)

[Donát Nagy via cfe-commits]

NagyDonat wrote:

@PiotrZSL I see, thanks for the explanation, the "colons may confuse parsers" question is a good point. I think I'll return to using semicolons, because that's what was used before my commit.

https://github.com/llvm/llvm-project/pull/95550