bindings: python: consider a changelog

[vfazio]

Marcus from Buildroot asked if we maintained a changelog for the bindings. We dont, but maybe we should consider it.

https://lists.buildroot.org/pipermail/buildroot/2026-April/800096.html

[brgl]

No objections from my side.

[vfazio]

Submitted as part of series: https://lore.kernel.org/linux-gpio/20260522200419.105496-1-vfazio@gmail.com/