Short summary on this one as problem still exists: Since Local Security Authority (LSA) protection is on per default starting with Windows 11 24H2, this prompt will appear. Bonjour might be installed through iTunes or other third-party software (like Printix that simulates AirPrint). Only fix so far, is an uninstallation (if not needed any more). If needed, there is no solution. Also, Microsoft does not offer policies to define exclusions. Turning of LSA can't be seen as acceptable solution.
In the end, Apple needs to fix their Bonjour DLL. Currently, it is not fulfilling the requirements defined by Microsoft like "digitally signed with a Microsoft signature": Configure added LSA protection | Microsoft Learn
