hashes: SHA256 documentation updated
hashes: SHA256 documentation updated

Fixed typo

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