Update documentation for Seer AI features (#14204)

Co-authored-by: Cursor Agent <[email protected]>

Author: HazAT

develop-docs/self-hosted/index.mdx

@@ -17,7 +17,7 @@ The difference only resides on a few things that are impossible to be hosted by
 - Pricing tiers & Billing system.
 - [Spike protection](https://docs.sentry.io/pricing/quotas/spike-protection/), as it is tightly coupled with Billing Quotas.
 - [Spend Allocation](https://docs.sentry.io/pricing/quotas/spend-allocation/), as it is tightly coupled with Billing Quotas.
-- Seer and other AI & ML features, although the code is open at [getsentry/seer](https://github.com/getsentry/seer).
+- Seer and other AI & ML features, as these are currently closed source.
 - [Data Storage Location](https://docs.sentry.io/organization/data-storage-location/), because you own your data.
 - [iOS Symbolication](https://docs.sentry.io/platforms/apple/data-management/debug-files/symbol-servers#built-in-repositories), because Apple does not provide a public symbol server, nor do they allow us to distribute the Debug Information Files (DIFs) ourselves.
 - Android system symbols, with symbols collected using its [symbol-collector service](https://github.com/getsentry/symbol-collector/), but cannot be redestributed. This helps give better quality stack traces for native Android crashes.