docs: update supported device table

remove known issue #750 from silabs EFM32GG table entry

docs/reference/supported.rst

@@ -88,7 +88,7 @@ Supported MCUs
 |              +--------------------+-------------------+--------------------+-------------------+-------------------+--------------+
 |              | RX65N              | |:green_square:|  |                    | |:green_square:|  | |:x:|             |              |
 +--------------+--------------------+-------------------+--------------------+-------------------+-------------------+--------------+
-| Silabs       | EFM32GG12          | |:green_square:|  | |:x:|              | |:green_square:|  | |:x:|             | #750         |
+| Silabs       | EFM32GG12          | |:green_square:|  | |:x:|              | |:green_square:|  | |:x:|             |              |
 +--------------+--------------------+-------------------+--------------------+-------------------+-------------------+--------------+
 | Sony         | CXD56              | |:green_square:|  | |:x:|              | |:green_square:|  | |:x:|             |              |
 +--------------+-------+------------+-------------------+--------------------+-------------------+-------------------+--------------+