[changelog tool] duplicated changelog item

https://github.com/Azure/azure-sdk-for-python/pull/48102/changes/7b0a7734f6f3a717ba3adb91dc1c199012def3c4#diff-6e2ee9838a9c7863cc1a7be71e36f6d057dbae52eead2afbf8d0cd50e7ef4493

<img width="763" height="419" alt="Image" src="https://github.com/user-attachments/assets/03a39a0a-2c14-47bf-a5c9-9a8dcedd6109" />

There are duplicated changelog item "Added model `TrustedHostSubscription`"