doc: bluetooth: mesh: Add dfu cli cancel command to doc

Add description of the `mesh model dfu cli cancel` shell command.

Signed-off-by: Pavel Vasilyev <[email protected]>

Author: PavelVPV

doc/connectivity/bluetooth/api/mesh/shell.rst

@@ -1108,6 +1108,16 @@ The Firmware Update Client model can be added to the mesh shell by enabling conf
 	* ``Group``: Optional group address to use when communicating with the Target nodes. If omitted, the Firmware Update Client will address each Target node individually.
 
 
+``mesh models dfu cli cancel [<Addr>]``
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+	Cancel the DFU procedure at any state on a specific Target node or on all Target nodes.
+	When a Target node address is provided, the Firmware Update Client model will try to cancel the DFU procedure on the provided Target node.
+	Otherwise, the Firmware Update Client model will try to cancel the ongoing DFU procedure on all Target nodes.
+
+	* ``Addr``: Optional unicast address of a Target node on which to cancel the DFU procedure.
+
+
 ``mesh models dfu cli apply``
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
@@ -1120,12 +1130,6 @@ The Firmware Update Client model can be added to the mesh shell by enabling conf
 	Confirm that the most recent DFU transfer was successfully applied on all Target nodes. Can only be called after a DFU transfer is completed and applied.
 
 
-``mesh models dfu cli progress``
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
-	Check the progress of the current transfer.
-
-
 ``mesh models dfu cli suspend``
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
@@ -1137,11 +1141,13 @@ The Firmware Update Client model can be added to the mesh shell by enabling conf
 
 	Resume the suspended DFU transfer.
 
-``mesh models dfu srv progress``
+
+``mesh models dfu cli progress``
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 	Check the progress of the current transfer.
 
+
 ``mesh models dfu cli instance-set <ElemIdx>``
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^