doc: bluetooth: mesh: Update supported Bluetooth Mesh Protocol version

Update Bluetooth Mesh Protocol supported version to 1.1.1.

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

Author: PavelVPV

doc/connectivity/bluetooth/api/mesh.rst

@@ -5,7 +5,7 @@ Bluetooth Mesh Profile
 
 The Bluetooth Mesh profile adds secure wireless multi-hop communication for
 Bluetooth Low Energy. This module implements the
-`Bluetooth Mesh Protocol Specification v1.1 <https://www.bluetooth.com/specifications/specs/mesh-protocol/>`_.
+`Bluetooth Mesh Protocol Specification v1.1.1 <https://www.bluetooth.com/specifications/specs/mesh-protocol-1-1-1/>`_.
 
 Read more about Bluetooth Mesh on the
 `Bluetooth SIG Website <https://www.bluetooth.com/bluetooth-resources/?tags=mesh>`_.