f Apply suggestions from code review

Co-authored-by: Alexandre Abadie <[email protected]>

README.md

@@ -85,11 +85,11 @@ RIOT provides features including, but not limited to:
 ### Related Projects
 
 - [**Ariel OS**](https://github.com/ariel-os/ariel-os) is an offspring of RIOT written
-in Rust following RIOT's targets and [vision](https://doc.riot-os.org/vision.html).
+in Rust following RIOT's goals and [vision](https://doc.riot-os.org/vision.html).
 - [Contiki(-NG)](https://github.com/contiki-ng/contiki-ng) was an inspiration for starting RIOT, a operating system for constrained devices with a focus on networking.
 - [NuttX](https://github.com/apache/nuttx) is another general purpose microcontroller OS with a focus on bringing POSIX to MCUs
 - [RT-Thread](https://github.com/RT-Thread/rt-thread) is a microcontroller operating system with strong roots in China and a large community there, it has extensive support for MCUs from Chinese vendors, but also for western ones.
-- [Zephyr](https://github.com/zephyrproject-rtos/zephyr) is general-purpose operating system for microcontrollers, shepparded by the Linux foundation.
+- [Zephyr](https://github.com/zephyrproject-rtos/zephyr) is a general-purpose operating system for microcontrollers, shepparded by the Linux foundation.
 
 ## Getting RIOT