Update changelog
Update changelog

The locale fix was not supposed to be included in the beta.1 release.
Same for the single instance support.

cozy-labs/cozy-desktop,nono/cozy-desktop,nono/cozy-desktop,cozy-labs/cozy-desktop,nono/cozy-desktop,nono/cozy-desktop,cozy-labs/cozy-desktop,cozy-labs/cozy-desktop