fixed typo

Signed-off-by: Christian Dietrich <christian.dietrich@itemis.de>

README.md

@@ -8,6 +8,6 @@ Checkout and run `mvn clean install -PuseSonatypeSnapshots`.
 
 With the above configuration, [Sonatype snapshots](https://oss.sonatype.org/content/repositories/snapshots) are used for upstream Xtext dependencies. The alternative profile `-PuseJenkinsSnapshots` activates the Maven repositories generated on the [Jenkins server](http://services.typefox.io/open-source/jenkins/) for [xtext-lib](https://github.com/eclipse/xtext-lib), [xtext-core](https://github.com/eclipse/xtext-core), and [xtext-extras](https://github.com/eclipse/xtext-extras) instead.
 
-## Continuos Integration
+## Continuous Integration
 
 This project is built by the [xtext-maven multi-branch job on Jenkins](http://services.typefox.io/open-source/jenkins/job/xtext-maven/).