sys/ubjson: fix typos
sys/ubjson: fix typos

aeneby/RIOT,OlegHahm/RIOT,josephnoir/RIOT,kaspar030/RIOT,smlng/RIOT,x3ro/RIOT,x3ro/RIOT,ant9000/RIOT,kYc0o/RIOT,miri64/RIOT,kYc0o/RIOT,aeneby/RIOT,OTAkeys/RIOT,OlegHahm/RIOT,authmillenon/RIOT,toonst/RIOT,basilfx/RIOT,jasonatran/RIOT,toonst/RIOT,toonst/RIOT,authmillenon/RIOT,smlng/RIOT,kaspar030/RIOT,aeneby/RIOT,OlegHahm/RIOT,basilfx/RIOT,miri64/RIOT,OlegHahm/RIOT,mtausig/RIOT,josephnoir/RIOT,OTAkeys/RIOT,smlng/RIOT,toonst/RIOT,OTAkeys/RIOT,smlng/RIOT,x3ro/RIOT,kaspar030/RIOT,miri64/RIOT,aeneby/RIOT,RIOT-OS/RIOT,ant9000/RIOT,basilfx/RIOT,mtausig/RIOT,OlegHahm/RIOT,kaspar030/RIOT,x3ro/RIOT,authmillenon/RIOT,mtausig/RIOT,ant9000/RIOT,jasonatran/RIOT,kYc0o/RIOT,basilfx/RIOT,josephnoir/RIOT,basilfx/RIOT,OTAkeys/RIOT,kaspar030/RIOT,mtausig/RIOT,kYc0o/RIOT,x3ro/RIOT,jasonatran/RIOT,yogo1212/RIOT,kYc0o/RIOT,RIOT-OS/RIOT,aeneby/RIOT,mtausig/RIOT,miri64/RIOT,toonst/RIOT,jasonatran/RIOT,authmillenon/RIOT,josephnoir/RIOT,OTAkeys/RIOT,yogo1212/RIOT,ant9000/RIOT,yogo1212/RIOT,RIOT-OS/RIOT,miri64/RIOT,jasonatran/RIOT,RIOT-OS/RIOT,authmillenon/RIOT,yogo1212/RIOT,yogo1212/RIOT,authmillenon/RIOT,RIOT-OS/RIOT,ant9000/RIOT,yogo1212/RIOT,josephnoir/RIOT,smlng/RIOT