Update README.rst

Author: tobiasraabe

README.rst

@@ -187,5 +187,5 @@ Acknowledgment
 
 The license also includes a copyright and permission notice from pytest since some
 modules, classes, and functions are copied from pytest. Not to mention how pytest has
-inspired the development pytask in general. Without the amazing work of Holger Krekel
+inspired the development of pytask in general. Without the amazing work of Holger Krekel
 and pytest's many contributors, this project would not have been possible. Thank you!