README.md: typos

Author: PMeira

README.md

@@ -40,4 +40,4 @@ If you are having issues using this Python interface, feel free to open an Issue
 Thanks to @tshort, Davis, @temcdrm, @GordStephen, @Muxelmann and @PMeira for their contributions, as well as all the users for their valuable feedback.
 
 See also our repositories for [DSS-Python](https://github.com/dss-extensions/dss_python) for the underlying Python package used in this package, and 
-[DSS C-API](https://github.com/dss-extensions/dss_capi) for modified and extended OpenDSS codebase using in DSS Extensions.
+[DSS C-API](https://github.com/dss-extensions/dss_capi) for the modified and extended OpenDSS codebase used in DSS Extensions.