Screenshots still say `Project Firefly Apps`, need updated screenshots

[shazron]

Screenshots at: https://developer.adobe.com/app-builder/docs/get_started/app_builder_get_started/publish-app#check-your-published-app-at-experience-cloud

Several of them have old names.

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Issue in /main/src/pages/get_started/app_builder_get_started/publish-app.md