Rate Limit Focus Pages (Duplicate, Failed) should link back to All Rate Limits page

[jvanasco]

The two rate limit focus pages:

• https://letsencrypt.org/docs/duplicate-certificate-limit/
• https://letsencrypt.org/docs/failed-validation-limit/

Should have a link back to https://letsencrypt.org/docs/rate-limits/

I suggest something like the following (markdown):

# Learn More About Rate Limits

Let’s Encrypt provides rate limits to ensure fair usage by as many people as possible.
To learn more about rate limits, best practices, and what other limits you should expect, please visit /rate-limits.

[aarongable]

@beautifulentropy you want to take this?

[beautifulentropy]

@beautifulentropy you want to take this?

@aarongable I don't have perms to assign this to myself but you're free to assign this to me.

[jvanasco]

@aarongable @beautifulentropy This should probably not be done for quite some time.

On the forum, Jillian noted this was implemented on purpose (e.g. a dark pattern) to isolate users who see this from the override form on the main rate-limit page.