Update Changelog for 24.1.1 (Consensys#7910)

CHANGELOG.md

@@ -11,18 +11,6 @@ the [releases page](https://github.com/Consensys/teku/releases).
 
 ### Breaking Changes
 
-- Removed the following hidden feature flags which are no longer
-  needed: `--Xfork-choice-update-head-on-block-import-enabled`
-  and `--Xbls-to-execution-changes-subnet-enabled`
-
 ### Additions and Improvements
 
-- Added a hidden flag `--Xfork-choice-updated-always-send-payload-attributes` which would cause 
-  payload attributes to be calculated and sent with every fcU. This could be useful for builders
-  consuming the `payload_attributes` SSE events.
-- Added Deneb (aka Dencun) configuration for Sepolia network for epoch 132608 (2024-01-30 22:51:12 UTC).
-- Added Deneb (aka Dencun) configuration for Chiado network for epoch 516608 (2024-01-31 18:15:40 UTC).
-- Added Deneb (aka Dencun) configuration for Holesky network for epoch 29696 (2024-02-07 11:34:24 UTC).
-- Generate key at `—p2p-private-key-file` path if specified file doesn't exist.
-
 ### Bug Fixes