Japanese and Chinese versions received a voice recognition update. The English update slightly enlarges the hitbox for "Voice Exercises" (like shouting "Whoosh!"), which was necessary for quiet living rooms.
If you find a "Ring Fit Adventure [01002FF00C258000][v65536].nsp" file, you are looking at the v1.2.0 update (NSP naming conventions often use v0, v196608, v262144, etc., but v1.2.0 typically translates to v65536 in hex). Ring Fit Adventure Switch NSP -Update-
Here is the granular changelog:
While not a hardware fix, v1.2.0 adds software dead zones for the thumbsticks. This prevents the in-game menu cursor from sliding when your controller has mechanical drift. Japanese and Chinese versions received a voice recognition