Update boards/msbiot/doc.md

Co-authored-by: crasbe <crasbe@gmail.com>

Author: maribu

boards/msbiot/doc.md

@@ -168,8 +168,8 @@ found [here](https://github.com/RIOT-OS/RIOT/tree/master/tests/drivers/mpu9x50).
 |:--------------------- |:------------------------------------------------------------------------------------------------- |
 | Type                  | Nine-Axis MotionTracking Device (Gyro, Accel and Compass)                                         |
 | Vendor                | Invensense                                                                                        |
-| Product Specification | [Product Specification][]                                                                         |
-| Register Map          | [Register Map][]                                                                                  |
+| Product Specification | [Product Specification]                                                                           |
+| Register Map          | [Register Map]                                                                                    |
 | Driver                | @ref drivers_mpu9x50                                                                              |
 | I²C Device            | I2C1 (Mapped to I2C_0 in RIOT)                                                                    |
 | SCL                   | PB6                                                                                               |