Fix wrong permalinks in documentation

Author: brotkrueml

Documentation/guides.xml

@@ -11,6 +11,7 @@
         project-issues="https://github.com/brotkrueml/codehighlight/issues"
         edit-on-github-branch="main"
         edit-on-github="brotkrueml/codehighlight"
+        interlink-shortcode="brotkrueml/codehighlight"
         typo3-core-preferred="stable"
     />
     <project