Update CHANGELOG.md

Co-authored-by: Sebastian <[email protected]>

Author: kamil-certat

CHANGELOG.md

@@ -32,7 +32,7 @@ Please refer to the [NEWS](NEWS.md) for a list of changes which have an affect o
 #### Outputs
 
 ### Documentation
-- Fix and refresh links to mailing lists (PR# by Kamil Mańkowski)
+- Fix and refresh links to mailing lists (PR#2609 by Kamil Mańkowski)
 
 ### Packaging
 - Replace `/opt/intelmq` example paths in bots with variable `VAR_STATE_PATH` for correct paths in LSB-path setups like with packages (PR#2587 by Sebastian Wagner).