Update _docs/tutorials/core/first_application_rtos/index.md

Co-authored-by: Ralph Lange <ralph-lange@users.noreply.github.com>

Author: pablogs9

_docs/tutorials/core/first_application_rtos/index.md

@@ -30,7 +30,7 @@ Further information about micro-ROS build system can be found [here](https://git
 The following hardware will be used:
 
 
-| [Olimex STM32-E407](https://www.olimex.com/Products/ARM/ST/STM32-E407/open-source-hardware)                       |
+* [Olimex STM32-E407](https://www.olimex.com/Products/ARM/ST/STM32-E407/open-source-hardware)
 | [Olimex ARM-USB-TINY-H](https://www.olimex.com/Products/ARM/JTAG/ARM-USB-TINY-H/)                                 |
 | [USB-Serial Cable Female](https://www.olimex.com/Products/Components/Cables/USB-Serial-Cable/USB-Serial-Cable-F/) |