Merge branch 'pr-2121-changelog' into develop

Author: sebix

CHANGELOG.md

@@ -67,6 +67,7 @@ CHANGELOG
 - `intelmq.bots.experts.domain_valid`: New bot for checking domain's validity (PR#1966 by Marius Karotkis).
 - `intelmq.bots.experts.truncate_by_delimiter.expert`: Cut string if its length is higher than a maximum length (PR#1967 by Marius Karotkis).
 - `intelmq.bots.experts.remove_affix`: Remove prefix or postfix strings from a field (PR#1965 by Marius Karotkis).
+- `intelmq.bots.experts.asn_lookup.expert`: Fixes update-database script on the last few days of a month (PR#2121 by Filip Pokorný, fixes #2088).
 
 #### Outputs
 - Removed `intelmq.bots.outputs.postgresql`: this bot was marked as deprecated in 2019 announced to be removed in version 3 of IntelMQ (PR#2045 by Birger Schacht).