README upgrade (#469)

Author: jwierzbo

CHANGELOG.md

@@ -5,6 +5,7 @@
 - Add `IsExternalStorageError` to check for [external storage errors](https://www.arangodb.com/docs/stable/appendix-error-codes.html#external-arangodb-storage-errors)
 - `nested` field in arangosearch type View
 - Fix: TTL index creation fails when expireAt is 0
+- [V2] Support for Collection Indexes
 - Fix: Fetching single InvertedIndex fails with Marshalling error
 
 ## [1.4.1](https://github.com/arangodb/go-driver/tree/v1.4.1) (2022-12-14)