gnrc: nib: fix DOXYGE -> DOXYGEN
gnrc: nib: fix DOXYGE -> DOXYGEN

kaspar030/RIOT,x3ro/RIOT,rfuentess/RIOT,jasonatran/RIOT,aeneby/RIOT,basilfx/RIOT,BytesGalore/RIOT,kYc0o/RIOT,RIOT-OS/RIOT,miri64/RIOT,x3ro/RIOT,josephnoir/RIOT,OTAkeys/RIOT,kaspar030/RIOT,OlegHahm/RIOT,smlng/RIOT,cladmi/RIOT,smlng/RIOT,BytesGalore/RIOT,authmillenon/RIOT,toonst/RIOT,x3ro/RIOT,x3ro/RIOT,A-Paul/RIOT,mfrey/RIOT,mfrey/RIOT,BytesGalore/RIOT,mtausig/RIOT,rfuentess/RIOT,josephnoir/RIOT,authmillenon/RIOT,ant9000/RIOT,yogo1212/RIOT,mtausig/RIOT,BytesGalore/RIOT,jasonatran/RIOT,basilfx/RIOT,RIOT-OS/RIOT,kaspar030/RIOT,kaspar030/RIOT,mfrey/RIOT,authmillenon/RIOT,lazytech-org/RIOT,BytesGalore/RIOT,ant9000/RIOT,cladmi/RIOT,smlng/RIOT,cladmi/RIOT,cladmi/RIOT,yogo1212/RIOT,jasonatran/RIOT,mtausig/RIOT,miri64/RIOT,toonst/RIOT,aeneby/RIOT,aeneby/RIOT,jasonatran/RIOT,OlegHahm/RIOT,miri64/RIOT,kYc0o/RIOT,x3ro/RIOT,A-Paul/RIOT,basilfx/RIOT,authmillenon/RIOT,cladmi/RIOT,smlng/RIOT,lazytech-org/RIOT,A-Paul/RIOT,OlegHahm/RIOT,mtausig/RIOT,toonst/RIOT,ant9000/RIOT,toonst/RIOT,OlegHahm/RIOT,rfuentess/RIOT,OTAkeys/RIOT,mfrey/RIOT,yogo1212/RIOT,OlegHahm/RIOT,OTAkeys/RIOT,OTAkeys/RIOT,mfrey/RIOT,rfuentess/RIOT,A-Paul/RIOT,aeneby/RIOT,yogo1212/RIOT,rfuentess/RIOT,authmillenon/RIOT,RIOT-OS/RIOT,smlng/RIOT,A-Paul/RIOT,aeneby/RIOT,josephnoir/RIOT,lazytech-org/RIOT,toonst/RIOT,RIOT-OS/RIOT,kYc0o/RIOT,ant9000/RIOT,yogo1212/RIOT,ant9000/RIOT,kYc0o/RIOT,miri64/RIOT,miri64/RIOT,basilfx/RIOT,mtausig/RIOT,lazytech-org/RIOT,yogo1212/RIOT,lazytech-org/RIOT,authmillenon/RIOT,josephnoir/RIOT,jasonatran/RIOT,basilfx/RIOT,kaspar030/RIOT,kYc0o/RIOT,OTAkeys/RIOT,RIOT-OS/RIOT,josephnoir/RIOT