feat: add changelog and update release notes of v1.6.0 (#1437)

**Motivation:**

feat: add changelog and update release notes of v1.6.0

**Modifications:**

add changelog and update release notes of v1.6.0

**Result:**

add changelog and update release notes of v1.6.0

Author: bowenli86

CHANGELOG/CHANGELOG-1.6.0.md

@@ -18,7 +18,27 @@
 🔧 **Improvements**
 - When finalizing an `EigenPod` checkpoint (`proofsRemaining == 0`), the contract will store the finalized checkpoint in storage. This can be queried via `EigenPod.currentCheckpoint()`. Starting a new checkpoint will overwrite this previously-finalized checkpoint.
 - Added semver to `Eigen`
+- Signatures of a few `EigenPod` events are changed to match the rest events and take validator pubkey hash instead of validator index, which standardized `EigenPod` events signature
+
+🐛 Bug Fixes
+- For Hoodi, updates fixes ethPOS deposit contract to point to `0x00000000219ab540356cBB839Cbe05303d7705Fa`
 
 ## Changelog
 
-* feat: MOOCOW and ELIP5 ([#1375](https://github.com/Layr-Labs/eigenlayer-contracts/pull/1375))
+- feat: merge Moocow and ELIP5 into main [PR #1425](https://github.com/layr-labs/eigenlayer-contracts/pull/1425)
+- docs: proper markdown [PR #1435](https://github.com/layr-labs/eigenlayer-contracts/pull/1435)
+- docs: update readme
+- chore: update testnet addresses for redistribution [PR #1428](https://github.com/layr-labs/eigenlayer-contracts/pull/1428)
+- chore: remove User_M2.t.sol
+- feat: update EIGEN binding
+- chore: resolve conflicts in upgrade.json
+- chore: update harness class formatting
+- chore: complete v1.6.0 changelog
+- chore: changelog and bindings
+- test: add more script tests for Eigen and standardize semver
+- feat: add semver to eigen [PR #1371](https://github.com/layr-labs/eigenlayer-contracts/pull/1371)
+- feat: add TokenWrapped and TokenUnwrapped events in Eigen for observability [PR #1356](https://github.com/layr-labs/eigenlayer-contracts/pull/1356)
+- feat: change eigenpod events to use pubkeyHash over index
+- feat: release scripts for moocow and elip5
+- feat: currentCheckpoint now returns finalized checkpoint
+- feat: implement consolidation and withdrawal requests