chore(changelog): restore pause-key example entry (hiero-ledger#833)

Signed-off-by: undefinedIsMyLife <shinetina169@gmail.com>

Author: undefinedIsMyLife

CHANGELOG.md

@@ -8,6 +8,7 @@ This changelog is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.
 
 ### Added
 
+- Add `examples/tokens/token_create_transaction_pause_key.py` example demonstrating token pause/unpause behavior and pause key usage (#833)
 - Add example demonstrating usage of `CustomFeeLimit` in `examples/transaction/custom_fee_limit.py`
 - Added `.github/workflows/merge-conflict-bot.yml` to automatically detect and notify users of merge conflicts in Pull Requests.
 - Added validation logic in `.github/workflows/pr-checks.yml` to detect when no new chnagelog entries are added under [Unreleased]