dillon1000/react

Fix release script --commit param (#20720)

PR #20717 accidentally broke the `--commit` parameter because the
script errors if you provide both a `--build` and a `--commit`.

I solved by removing the validation error. When there's a conflict, it
will choose the --`build`.

(Although maybe we should `--build` entirely and always uses `--commit`.
I think `--commit` is a sufficient replacement.)