typo fixed in readme

Author: Rajib Chakravorty

README.md

@@ -17,7 +17,7 @@ Anyone interested in quantum control is welcome to contribute to this project.
 
 ## Installation
 
-Q-CTRL Qiskit can be install through `pip` or from source. We recommend
+Q-CTRL Qiskit can be installed through `pip` or from source. We recommend
 the `pip` distribution to get the most recent stable release. If you want the
 latest features then install from source.