Fix broken link on extensions guide docs
The link to the backup architecture had an extra `]`
@@ -34,7 +34,7 @@ consumption) from the container itself via SQL queries.
In order to do this, `pgnodemx` requires information from the Kubernetes [DownwardAPI](https://kubernetes.io/docs/tasks/inject-data-application/downward-api-volume-expose-pod-information/)
to be mounted on the PostgreSQL pods. Please see the `pgnodemx and the DownwardAPI`
-section of the [backup architecture]]({{< relref "architecture/backups.md" >}}) page for more information on
+section of the [backup architecture]({{< relref "architecture/backups.md" >}}) page for more information on
where and how the DownwardAPI is mounted.
### `pgnodemx` Configuration
