Bard’s Gemini rename, spotted in an early changelog by @evowizz — confirmed
The changelog surfaced on Feb 3, 2024; Google made the switch on Feb 8.
Leaked on 03 February 2024

On Feb 3, 2024, @evowizz posted that Google had added a new Bard changelog with major changes. (source: 9to5Google)
9to5Google reported on Feb 1 that Google was preparing to rename Bard to Gemini, and on Feb 3 that an early changelog pointed to a Feb 7 rebrand with an Android app. Google announced on Feb 8 that Bard was now Gemini.
Confirmed; the switch came a day after the changelog date.