Update CHANGELOG.md

Author: NielsPilgaard

CHANGELOG.md

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 ### Enigmatica 2: Expert Changelog
 
+## 1.90f
+
+_Forge-1.12.2-14.23.5.2860_ | _[Modlist](https://github.com/NillerMedDild/Enigmatica2Expert/blob/master/changelogs/modlist_1.90f.md)_ | _[Mod Updates](https://github.com/NillerMedDild/Enigmatica2Expert/blob/master/changelogs/CHANGELOG_MODS_1.90f.md)_
+
+**Fixed bugs**
+
+
+
+---
+
 ## 1.90
 
 _... and 1.90a, 1.90b, 1.90c, 1.90d and 1.90e_