Fix redirect for 6.11 and links in Catalog page

[hillaryfraley]

Description

• In static.json, fixes typo in regex for redirecting 6.11 > latest
• In https://docs.sensu.io/sensu-go/latest/catalog/sensu-catalog/#find-integrations, fixes links to alphabetized, categorized, and metadata-based sections

Motivation and Context

• Links for 6.11 are displaying a 404 instead of redirecting to latest
• Links in published Catalog page are incorrect

[XenGi]

https://docs.sensu.io/sensu-go/6.11 still doesn't work. Does this need another fix?

[jhenderson-pro]

This appears to be the case. Thanks for letting us know: https://docs.sensu.io/sensu-go/6.111