README-MAINTAINER: fix jenkins job url

Author: ilg-ul

README-MAINTAINER.md

@@ -113,7 +113,7 @@ Wait for the CI to confirm that the build passed.
 
 - go to https://ci.eclipse.org/embed-cdt/
 - login (otherwise the next link is not visible!)
-- use the [make-pre-release-from-master]('https://ci.eclipse.org/embed-cdt/job/make-pre-release-from-master')
+- use the [make-pre-release-from-master](https://ci.eclipse.org/embed-cdt/job/make-pre-release-from-master)
 Jenkins job to copy the files from `builds/master` to `updates/neon-test`,
 which is the public location for the pre-release
 - click the **Build Now** link