One-touch coupler lock

The one-touch coupler of Anycubic I3 Mega is locked with a 2 mm wide binding band, but this binding band is too thin to be available at DIY shops. So I created an alternative lock.

### OnetouchCouplerLock-v2.stl
There was no problem with Aniycubic I3 Mega, but I adjusted it when I installed it on Geeetech A10M.

`This explanatory note machine-translated Japanese to English with Google Translate.`