Update libs/cardano-ledger-core/CHANGELOG.md

Co-authored-by: teodanciu <teodora.danciu@tweag.io>

Author: Soupstraw

libs/cardano-ledger-core/CHANGELOG.md

@@ -4,6 +4,9 @@
 
 * Add `fromStrictMaybeL`, `toStrictMaybeL`
 * Add `memoRawTypeL`
+* Remove `getterMemoRawType`
+* Add `EncCBOR` instance for `MemoBytes`
+* Add `TxLevel`, `EraTxLevel`, `HasEraTxLevel` 
 * Rename `PoolParams` to `StakePoolParams`
   - Replace the prefix for all the fields of this type from `pp*` -> `spp*`
   - Rename the lenses for the fields from `ppCostL`, `ppMetadataL` and `ppVrfL` to `sppCostL`, `sppMetadataL` and `sppVrfL`