bump version reference

Author: EskiMojo14

docs/api/createSlice.mdx

@@ -847,7 +847,7 @@ reducers: (create) => {
 
 ### Writing your own creators
 
-In version v2.2.0 (TODO), we introduced a system for including your own creators.
+In version v2.3.0, we introduced a system for including your own creators.
 
 The below documentation will cover how to write your own creators, and how to use them with `createSlice`.