[llvm] workflows/release-binaries: Remove .git directory from artifacts (PR #106310)

[Aiden Grossman via llvm-commits]

boomanaiden154 wrote:

> I'm not sure if the composite actions support top-level permissions, but I'll try it.

Ah, it's an action. I did not realize that.

https://github.com/llvm/llvm-project/pull/106310