Update CHANGELOG.md

version bump

CHANGELOG update

Merge pull request #363 from Paciente8159/version-bump

v1.6

core support for RP2040

- fixed compilation errors for all platforms
- updated compilation version

Merge pull request #357 from Paciente8159/version-bump

version bump to 1.5.7

Merge pull request #338 from Paciente8159/version-bump

version bump

version bump

Merge pull request #320 from Paciente8159/319-bug-ic74hc595-stepper-e…

…nable-control-missing-and-modules-enabled-error

IC74HC595 stepper enable control missing and modules enabled error

Merge pull request #318 from Paciente8159/version-bump

Version bump