Fixed missing date in changelog

Geolim4 · Geolim4 · commit e84ae271800c · 2022-04-15T23:30:16.000+02:00
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,5 +1,5 @@
 ## 9.1.1
-##### _Date to be defined_
+##### 15 april 2022
 - __Core__
   - Fixed #860 // Cache item throw an error on reading with DateTimeImmutable date objects
   - Fixed an issue with tags not properly reinitialized when a backend driver returns an expired cache item
