Fix typo in previous commit

Author: Patrick Bechon

extras/docs/quickstart.rst

@@ -128,6 +128,6 @@ that demonstrate the different functionality of the library.
 When you first install Simpit, you have to modify the *Settings.cfg* file that is found in the *GameData\KerbalSimpit* folder.
 You can copy the provided ``Settings.cfg.sample`` as a baseline, and you must at least define the port name to use. More information in :any:`troubleshooting`.
 
-Simpit allow several controllers to be used at the same time. For this, you can define several *SerialPort* blocks in the *Settings.cfg* file. All controllers are managed independantely.
+Simpit allows several controllers to be used at the same time. For this, you can define several *SerialPort* blocks in the *Settings.cfg* file. All controllers are managed independently.
 
-Simpit also allow to open/close a port while the game is running. This allow to reprogram the Arduino while KSP is running (you have to close the port, upload the program, open the port again).
+Simpit also allows you to open/close a port while the game is running. This allows you to reprogram the Arduino while KSP is running (you have to close the port, upload the program, open the port again).