fix project update logic for detecting name changes correctly

[smarlaku820]

As highlighted in the below screenshot, when project metadata is updated it is triggering a rename_project slack notification.

Project Metadata Update:

Slack Notification Triggered:

Fix -

• Simplified the project update logic in the update action.
• Introduced the project_name_changed? method to check if the project name has changed.

After this project_rename slack notification is not triggered if metadata is updated. And the flash messages are also updated accordingly.