Spelling fix for paragraph

Author: aliphys

library.properties

@@ -3,7 +3,7 @@ version=1.0.0
 author=Arduino
 maintainer=Arduino <[email protected]>
 sentence=POSIX Storage Library for the Portenta C33, Portenta H7, and Portenta Machine Control
-paragraph=One-stop solution for using POSIX storage functions with SD cards and USB thumb drives with a unified API and without the need for seperate libraries.
+paragraph=One-stop solution for using POSIX storage functions with SD cards and USB thumb drives with a unified API and without the need for separate libraries.                                                                      
 category=Data Storage
 url=https://github.com/arduino-libraries/Arduino_POSIXStorage/
 depends=Arduino_USBHostMbed5