website/docs: fix placeholder leftover (#17737)

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

Author: BeryJu

website/docs/releases/2025/v2025.10.md

@@ -17,7 +17,7 @@ slug: "/releases/2025.10"
 
 In previous versions, authentik used Redis for caching, tasks, the embedded proxy outpost's session store, and WebSocket connections. Since [2025.8](./v2025.8.mdx), tasks were migrated to use Postgres. With this release we've also migrated caching, the embedded outpost, and WebSocket to Postgres, fully removing the need for Redis.
 
-As a result of this change, it is expected that authentik will use roughly TODO% more database connections to Postgres. Redis-related settings have also been removed and can be deleted from your configuration.
+As a result of this change, it is expected that authentik will use roughly 50% more database connections to Postgres. Redis-related settings have also been removed and can be deleted from your configuration.
 
 If your Postgres instance requires a TLS connection, authentik now requires TLS 1.3 or the Extended Master Secret extension to connect to Postgres.