Update Elastic Security Serverless doc

[angorayc]

https://www.elastic.co/pricing/serverless-security
We are going to have a new product tier Elastic AI SOC Engine GA for serverless on 6 Aug.

The page above should be updated to include this tier.

https://github.com/elastic/cloud/issues/144558

[benironside]

@angorayc The page in the issue description is owned by marketing. Is there a docs related ask here?

[bmorelli25]

@angorayc — I'm going to close this as a wontfix as my team doesn't have any control over the pricing page. @benironside will reach out via Slack to confirm there's no docs ask. If there is, we'll reopen and prioritize accordingly. Thanks!