doc: changelog for pr#2560

Author: sebix

CHANGELOG.md

@@ -49,6 +49,7 @@
 
 ### Documentation
 - `docs/admin/installation/linux-packages`: Add `[signed-by=]` options, add wget command as alternative to curl (PR#2547 by Sebastian Wagner).
+- Add documentation on the Redis pipeline (databases, configuration), fix generic pipeline documentation and add missing information on parameters, add unlinked intelmqctl docs to the index and TOC (PR#2560 by Sebastian Wagner).
 
 ### Packaging