Update CHANGELOG.md

Author: tier940

CHANGELOG.md

@@ -1,10 +1,11 @@
 # v2.4.2
-- Delete unused steam machines.
+- Delete unused steam machines. [#309](https://github.com/GTModpackTeam/GTExpert-Core/pull/309)
+- Advanced Chemical Plant to be compatible with PerfectOC. [#310](https://github.com/GTModpackTeam/GTExpert-Core/pull/314)
 
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 # v2.4.1
-- A recipe for processing FluixAlloy Molten in AlloyBlastFurnace into Ingot using Mold has been added.
+- A recipe for processing FluixAlloy Molten in AlloyBlastFurnace into Ingot using Mold has been added. [#307](https://github.com/GTModpackTeam/GTExpert-Core/pull/307)
 
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