Update CHANGELOG

Author: aldur

CHANGELOG.md

@@ -17,6 +17,7 @@ and this project adheres to the versioning scheme outlined in the [README.md](RE
     - `get-tenure-info?` added
     - `get-block-info?` removed
 - Added `/v3/signer/{signer_pubkey}/{reward_cycle}` endpoint
+- Added `tenure_height` to `/v2/info` endpoint
 - Added optional `timeout_ms` to `events_observer` configuration
 
 ## [2.5.0.0.7]