docs: We don't need bnx extension for talos

Author: nicholaskuechler

docs/user-guide/openstack-image.md

@@ -96,7 +96,7 @@ Using the [Talos image factory][talos-image-factory] to create the image:
 * Choose the version and hit next
 * Choose `OpenStack` for the Cloud provider and hit next
 * Choose your machine architecture - in our case it's `amd64` - and hit next
-* Choose system extensions and drivers you may need. In our case we want the `amd-ucode` and `bnx2-bnx2x` extensions. Then hit next.
+* Choose system extensions and drivers you may need. In our case we want the `amd-ucode` extension. Then hit next.
 * Choose any customizations you may need. Understack works with the defaults. Then hit next.
 * On this page you can download The disk image for example `openstack-amd64.raw.xz`