Changelog randomize favicon refresh

https://github.com/FreshRSS/FreshRSS/issues/1298

CHANGELOG.md

@@ -15,7 +15,7 @@
 	* In a multi-user context, take better advantage of other users’ refreshes [#1280](https://github.com/FreshRSS/FreshRSS/pull/1280)
 	* Support custom ports `localhost:3306` for database servers [#1241](https://github.com/FreshRSS/FreshRSS/issues/1241)
 	* Add date to exported files [#1240](https://github.com/FreshRSS/FreshRSS/issues/1240)
-	* Auto-refresh favicons after 15 days [#1181](https://github.com/FreshRSS/FreshRSS/issues/1181)
+	* Auto-refresh favicons once or twice a month [#1181](https://github.com/FreshRSS/FreshRSS/issues/1181), [#1298](https://github.com/FreshRSS/FreshRSS/issues/1298)
 * Bug fixing
 	* Correction of bugs related CSRF tokens introduced in version 1.5.0 [#1253](https://github.com/FreshRSS/FreshRSS/issues/1253), [44f22ab](https://github.com/FreshRSS/FreshRSS/pull/1261/commits/d9bf9b2c6f0b2cc9dec3b638841b7e3040dcf46f)
 	* Fix bug in Global view introduced in version 1.5.0 [#1269](https://github.com/FreshRSS/FreshRSS/pull/1269)