doc: mcumgr: Fix license

mcumgr-client is Apache-2 and not BSD licensed. See:
https://github.com/vouch-opensource/mcumgr-client/blob/main/LICENSE

Signed-off-by: Jeppe Odgaard <[email protected]>

Author: Jeppe Odgaard

doc/services/device_mgmt/mcumgr.rst

@@ -55,7 +55,7 @@ project.
         +================================================================================+=========+=======+=====+========+==========+========+===========+=====+====+=====+======+==========+====+=======+======+========+===============+============+=========+
         | `AuTerm <https://github.com/thedjnK/AuTerm/>`_                                 | ✓       | ✓     | ✓   | ✕      | ✕        | ✓      | ✓         | ✓   | ✓  | ✓   | ✓    | ✓        | ✓  | ✓     | ✓    | ✓      | Application   | C++ (Qt)   | GPLv3   |
         +--------------------------------------------------------------------------------+---------+-------+-----+--------+----------+--------+-----------+-----+----+-----+------+----------+----+-------+------+--------+---------------+------------+---------+
-        | `mcumgr-client <https://github.com/vouch-opensource/mcumgr-client/>`_          | ✓       | ✓     | ✓   | ✕      | ✕        | ✓      | ✕         | ✕   | ✕  | ✓   | ✕    | ✕        | ✕  | ✕     | ✕    | ✕      | Application   | Rust       | BSD     |
+        | `mcumgr-client <https://github.com/vouch-opensource/mcumgr-client/>`_          | ✓       | ✓     | ✓   | ✕      | ✕        | ✓      | ✕         | ✕   | ✕  | ✓   | ✕    | ✕        | ✕  | ✕     | ✕    | ✕      | Application   | Rust       | Apache  |
         +--------------------------------------------------------------------------------+---------+-------+-----+--------+----------+--------+-----------+-----+----+-----+------+----------+----+-------+------+--------+---------------+------------+---------+
         | `mcumgr-web <https://github.com/boogie/mcumgr-web/>`_                          | ✓       | ✓     | ✓   | ✕      | ✕        | ✕      | ✓         | ✕   | ✕  | ✓   | ✕    | ✕        | ✕  | ✕     | ✕    | ✕      | Web page      | Javascript | MIT     |
         |                                                                                |         |       |     |        |          |        |           |     |    |     |      |          |    |       |      |        | (chrome only) |            |         |