Apple is offering a new update for AirPods Pro and AirPods 2 this evening, which are being released 2C54.
Apple says nothing about the changelog, even if this mj is intended logically to bring improvements to the costers.
The update will install automatically when you connect your liPhone or liPad headphones. It may take some time before the update is available to everyone.
You can always check if the update has been done sinceRglages>General>Information>AirPods. You will see if the version number has changed: old 2B588 – new 2C54.