Tag renaming improvement

We've improved how tag renaming works to ensure tag consistency throughout the system. When a tag name is updated, the change will now automatically apply everywhere the tag is used.

• On tag save, all instances of the old tag name are replaced with the new one.
• No manual updates are needed-changes take effect across all linked items.

This update reduces manual work, and minimizes the risk of outdated or mismatched tags when using tags for publishing. The feature is available for all users with tagging permissions and requires no additional setup.