Wrong "not" in description of `flycheck-checker-error-threshold`?

[m4lvin]

Checklist

• [X] I have checked existing issues for potential duplicates before creating this one.
• [X] I have read the [Troubleshooting guide][]. (Btw, the link here is empty but should probably be this?

Bug description

The description of flycheck-checker-error-threshold seems to contain a superfluous negation.

Steps to reproduce

Steps to reproduce the behavior:

1. M-x describe-variable
2. flycheck-checker-error-threshold
3. Read this paragraph:

https://github.com/flycheck/flycheck/blob/278d0810f05eb03600d835c2bdd67d6b55a58034/flycheck.el#L393-L397

Expected behavior

I think the errors are discarded, so the "not" in line 394 above should be removed?

System configuration

Flycheck version: 32snapshot (package: 20210825.1804)
Emacs version:    27.1
System:           x86_64-pc-linux-gnu
Window system:    x

Emacs configuration:

• [X] Plain Emacs / Custom configuration