docs: link GainForest in Hyperindex source note

Author: Kzoeps

pages/tools/hyperindex.md

@@ -12,7 +12,7 @@ Hyperindex (`hi`) is a Go AT Protocol AppView server that indexes records and ex
 - Backfill historical records from any user or the entire network
 - Run your own indexer for full control over data availability and query performance
 
-Built in Go. Hyperindex was originally built by our friends at GainForest; the Certified indexer is forked from [github.com/gainforest/hyperindex](https://github.com/gainforest/hyperindex). Seeing the GainForest GitHub organization or GainForest-hosted Hyperindex references in related tooling is expected. Tap reference implementation: [github.com/bluesky-social](https://github.com/bluesky-social/indigo/tree/main/cmd/tap).
+Built in Go. Hyperindex was originally built by our friends at [GainForest](https://gainforest.earth); the Certified indexer is forked from [github.com/gainforest/hyperindex](https://github.com/gainforest/hyperindex). Seeing the GainForest GitHub organization or GainForest-hosted Hyperindex references in related tooling is expected. Tap reference implementation: [github.com/bluesky-social](https://github.com/bluesky-social/indigo/tree/main/cmd/tap).
 
 Hosted production and staging endpoints: [Certified Services](/reference/certified-services#indexers).