drivers/sht3x: fix broken links
drivers/sht3x: fix broken links

authmillenon/RIOT,kaspar030/RIOT,OlegHahm/RIOT,basilfx/RIOT,RIOT-OS/RIOT,miri64/RIOT,miri64/RIOT,kYc0o/RIOT,authmillenon/RIOT,basilfx/RIOT,kaspar030/RIOT,basilfx/RIOT,ant9000/RIOT,kYc0o/RIOT,OTAkeys/RIOT,OTAkeys/RIOT,miri64/RIOT,yogo1212/RIOT,ant9000/RIOT,yogo1212/RIOT,OTAkeys/RIOT,yogo1212/RIOT,authmillenon/RIOT,OTAkeys/RIOT,jasonatran/RIOT,jasonatran/RIOT,ant9000/RIOT,kaspar030/RIOT,yogo1212/RIOT,ant9000/RIOT,OlegHahm/RIOT,authmillenon/RIOT,kYc0o/RIOT,ant9000/RIOT,authmillenon/RIOT,kYc0o/RIOT,OlegHahm/RIOT,RIOT-OS/RIOT,OlegHahm/RIOT,kYc0o/RIOT,miri64/RIOT,kaspar030/RIOT,RIOT-OS/RIOT,miri64/RIOT,basilfx/RIOT,OTAkeys/RIOT,jasonatran/RIOT,yogo1212/RIOT,jasonatran/RIOT,yogo1212/RIOT,OlegHahm/RIOT,jasonatran/RIOT,kaspar030/RIOT,basilfx/RIOT,RIOT-OS/RIOT,authmillenon/RIOT,RIOT-OS/RIOT