Update README.md

Fix typos

Author: lboue

Diff for: idf_component_examples/esp_matter_light/README.md

@@ -74,10 +74,10 @@ Those are the tested devices that have a WS2812 RGB LED and can run BLE, Wi-Fi a
 In case it is necessary to change the Button Pin or the REG LED Pin, please use the `menuconfig`
 `idf.py menuconfig` and change the Menu Option `Light Matter Accessory`
 
-## Using OpenThread with Matter
+## Building the Application using OpenThread and Matter
 
 This is possible with the ESP32-C6.  
-It is neessasy to have a Thread Border Routed in the Matter Environment. Check you matter hardware provider.  
+It is necessary to have a Thread Border Router in the Matter Environment. Check you Matter hardware provider.  
 In order to build the application that will use Thread Networking instead of Wi-Fi, please execute:
 
 Example for ESP32-S3/Linux | macOS: