documentatio: fix bad supported dev table format

docs/reference/supported.rst

@@ -42,7 +42,7 @@ Supported MCUs
 +--------------+---------+-------------+--------+------+-----------+-------------------+--------------+
 | NXP          | iMXRT   | RT10xx      | ✔      | ✔    | ✔         | ci_hs             |              |
 |              +---------+-------------+--------+------+-----------+-------------------+--------------+
-|              | Kinetis | KL25        | ✔      | ⚠     | ✖         |                   |              |
+|              | Kinetis | KL25        | ✔      | ⚠    | ✖         |                   |              |
 |              |         +-------------+--------+------+-----------+-------------------+--------------+
 |              |         | K32L2       | ✔      |      | ✖         |                   |              |
 |              +---------+-------------+--------+------+-----------+-------------------+--------------+