Update CHANGELOG.md

Author: tier940

CHANGELOG.md

@@ -1,3 +1,9 @@
+# 2.4.6
+- Add Large Rock Breaker [#321](https://github.com/GTModpackTeam/GTExpert-Core/pull/321)
+- Fix Electric Spawner [#323](https://github.com/GTModpackTeam/GTExpert-Core/pull/322)
+
+* * *
+
 # 2.4.5
 - Separate to [GTBeesMatrix](https://github.com/GTModpackTeam/GTBeesMatrix). [#320](https://github.com/GTModpackTeam/GTExpert-Core/pull/320)
     - The following mods have been separated into separate mods to improve maintainability.