[changelog] Release v4.9.8

Author: kdeldycke

changelog.md

@@ -1,10 +1,6 @@
 # Changelog
 
-## {gh}`4.9.8 (unreleased) <compare/v4.9.7...main>`
-
-```{{important}}
-This version is not released yet and is under active development.
-```
+## {gh}`4.9.8 (2022-01-15) <compare/v4.9.7...v4.9.8>`
 
 - \[mpm\] Fix propagation of build artefacts to GitHub release and PyPi.
 - \[mpm\] Fix test of labelling rules.