Docs: About page mentions rule severity numbers and probably shouldn't

[platinumazure]

From the "About" page:

Every rule:

• Is standalone
• Can be able to be turned off or on (nothing can be deemed “too important to turn off”)
• Can be set to be a warning or error individually
• Is turned on by providing a non-zero number and off by providing zero

The last bullet point is problematic for a few reasons:

1. It mentions the numeric severities, which are still allowed but semi-deprecated in favor of strings
2. In my opinion, it's way too specific about implementation/usage details for a high-level About page
3. In my opinion, it is redundant given the point above ("Can be set to a warning or error individually")

I would advocate removing the last bullet point entirely, but I would also accept modifying it to mention numeric and string severity levels.

(Originally filed at eslint/archive-website#261)

[platinumazure]

@nzakas Could you please share your thoughts on this point:

I would advocate removing the last bullet point entirely, but I would also accept modifying it to mention numeric and string severity levels.

Should the bullet point be removed or modified?

I'm happy to take this on once I know the correct approach 😄

[nzakas]

I think removing it is fine