Fix a typo in README.md
Fix a typo in README.md

ditribution -> distribution
EvgenyKarataev/docker-redmine,petiepooo/docker-redmine,ekulos/docker-redmine,scrapinghub/docker-redmine,hasegaw/docker-redmine,vladm/docker-redmine,tigerich/docker-redmine,petugez/docker-redmine,otsuka512/docker-redmine,sameersbn/docker-redmine,tigerich/docker-redmine,aurlaw/docker-redmine,cema-sp/docker-redmine,petiepooo/docker-redmine,otsuka512/docker-redmine,sameersbn/docker-redmine,intfrr/docker-redmine,vladm/docker-redmine,lynxis/docker-redmine,cema-sp/docker-redmine,ekulos/docker-redmine,capKopper/docker-redmine,intfrr/docker-redmine,lynxis/docker-redmine,rewiko/docker-redmine,cema-sp/docker-redmine,aurlaw/docker-redmine,petugez/docker-redmine,joshuacox/docker-redmine,rewiko/docker-redmine,patope/docker-redmine,capKopper/docker-redmine,cema-sp/docker-redmine,EvgenyKarataev/docker-redmine,rewiko/docker-redmine,sameersbn/docker-redmine,hasegaw/docker-redmine,scrapinghub/docker-redmine,cema-sp/docker-redmine,k-muramatsu/docker-redmine,otsuka512/docker-redmine,joshuacox/docker-redmine,rewiko/docker-redmine,k-muramatsu/docker-redmine,patope/docker-redmine