> Updating the minimum supported Rust version is a breaking change

This is not the majority sentiment, for better or for worse. The project stopped releasing "what version of Rust do you use most" in the survey results in 2020 (which is a shame, imho) the vast, vast majority of folks use the latest stable, and very few use a previous version of stable. I have no real reason to believe this overall trend has changed since then.

This is especially true for an application, which this project seems to be. Libraries may have more of a reason to explicitly lag behind the latest, but there's not really a good reason to bother if nobody else is going to depend on your code.