fix badged link for groups

Signed-off-by: Stefan Bischof <stbischof@bipolis.org>
diff --git a/generate-badges.groovy b/generate-badges.groovy
index 1b3c48f..97a7799 100644
--- a/generate-badges.groovy
+++ b/generate-badges.groovy
@@ -57,7 +57,7 @@
     }
     if (project.group) {
         println 'Adding group badge...'
-        badges.add("&#32;[![${project.group}](https://sling.apache.org/badges/group-${project.group}.svg)](https://github.com/apache/sling-aggregator/blob/master/docs/group/${project.group}.md)")
+        badges.add("&#32;[![${project.group}](https://sling.apache.org/badges/group-${project.group}.svg)](https://github.com/apache/sling-aggregator/blob/master/docs/groups/${project.group}.md)")
     }
     return badges
 }