Formatting fix

Author: CVYY39

docs/assembling.md

@@ -7,6 +7,7 @@
    ![Attaching Antennas](https://wiki.makerdiary.com/nrf52840-m2-devkit/assets/images/attaching-antennas-to-m2.webp)
 
 3. Insert the module into the connector as shown in the figure below:
+
    **Warning regarding the angle of insertion: Angled insertion is allowable and is preferred to minimize the insertion force. The angle of insertion is 5° ~ 25°, typically 20°.**
    ![Module Insertion](https://wiki.makerdiary.com/nrf52840-m2-devkit/assets/images/m2-module-insertion.png)