fix /config.json in .gitignore
fix /config.json in .gitignore

vector-im/riot-web,vector-im/vector-web,vector-im/vector-web,vector-im/riot-web,vector-im/vector-web,martindale/vector,vector-im/vector-web,vector-im/riot-web,vector-im/vector-web,vector-im/riot-web,martindale/vector,vector-im/riot-web,vector-im/riot-web