SLING-6766 - Javadoc: Include package org.apache.sling.adapter.annotations in the Sling javadocs

Correct inclusion of adapter-annotations in the Javadocs.
diff --git a/generate_javadoc_for_release.sh b/generate_javadoc_for_release.sh
index ad8db7a..9c48fea 100755
--- a/generate_javadoc_for_release.sh
+++ b/generate_javadoc_for_release.sh
@@ -22,7 +22,7 @@
 
 # add additional artifacts which are not part of the launchpad
 # https://issues.apache.org/jira/browse/SLING-6766
-artifacts+="adapter-annotations:1.0.0"
+artifacts+=" adapter-annotations:1.0.0"
 
 # checkout tags
 for artifact in $artifacts; do