updated changelog post 26.6 release

Author: rolfyone

CHANGELOG.md

@@ -8,23 +8,6 @@
 
 ### Breaking Changes
 
- * Teku now targets Java JDK 25 for builds and runtime.
- * Updated draft Gloas execution payload REST endpoints to match ethereum/beacon-APIs#613:
-   `GET /eth/v1/beacon/execution_payload_envelope/{block_id}` is now
-   `GET /eth/v1/beacon/execution_payload_envelopes/{block_id}`, and
-   `GET /eth/v1/validator/execution_payload_bid/{slot}/{builder_index}` is now
-   `GET /eth/v1/validator/execution_payload_bids/{slot}/{builder_index}`.
-
 ### Additions and Improvements
 
- - Added the Gloas `POST /eth/v1/beacon/states/{state_id}/builders` Beacon API endpoint from ethereum/beacon-APIs#614, with JSON and SSZ response support.
-
 ### Bug Fixes
- - Fixed a scenario where keys added via validator-api that rely on external signer are not slashing protected locally until the node is restarted. 
-   To work around this issue, users should either keep slashing protection enabled on the external signer or restart the node after calling the add api. 
- - Fixed automatic detection of local node IPv6 address
- - Make sure sync committee duties are retried while the EL is optimistic.
- - Fixed a potential issue in importing blocks when data is not available.
- - Fixed potential NPE when SSE are not closed correctly.
- - Improved pruning for data column sidecars.
- - Delayed DVT attestation selection proof submissions until the target epoch starts, preventing lookahead duties from being submitted too early and ensuring stale pending batches are cancelled when duties are rescheduled.