doc/rbd: repair ordered list

Fix the numbering in an ordered list. The numbering was thrown off
because a ".. prompt" directive was improperly indented (it wasn't
indented at all).

See ceph#55540 (comment)

Signed-off-by: Zac Dover <[email protected]>

Author: zdover23

doc/rbd/nvmeof-target-configure.rst

@@ -66,9 +66,9 @@ To download it use the following command:
 
 #. Create an NVMe subsystem:
 
-.. prompt:: bash #
+   .. prompt:: bash #
 
-   podman run -it quay.io/ceph/nvmeof-cli:latest --server-address GATEWAY_IP --server-port GATEWAY_PORT 5500 subsystem add --subsystem SUSYSTEM_NQN
+      podman run -it quay.io/ceph/nvmeof-cli:latest --server-address GATEWAY_IP --server-port GATEWAY_PORT 5500 subsystem add --subsystem SUSYSTEM_NQN
 
    The subsystem NQN is a user defined string, for example ``nqn.2016-06.io.spdk:cnode1``.