MyCR10S-V2.1.2.1

What's Changed

• Merge from Marlin Version V2.1.2.1
• Change PREHEAT_3_TEMP_HOTEND from 246 to 234

MyCR10S-V2.1.2

What's Changed

• Add a PlatformIO firmware build workflow by @pierre-quelin in #2
• Upload the Build Artifact by @pierre-quelin in #3

New Contributors

• @pierre-quelin made their first contribution in #2

Full Changelog: https://github.com/pierre-quelin/Marlin/commits/MyCR10S-V2.1.2