Update README.md

fix typo

Author: codingtony

README.md

@@ -12,7 +12,7 @@ for development related projects and also to promote and quickly show the capabi
 * tomcat7 : based on codingtony/tomcat7 and installs a vanilla version of Tomcat 7.0.54
 * rhodecode : the source management platform for Git and Mercurial repository  (v. 1.7.2)
 * artifactory : A popular opensource repository manager for Maven
-* jenkins : A popular CI opensource CI engine
+* jenkins : A popular opensource continuous integration (CI) engine
 
 ##Planned