README: Added link to comment flag docs (#2990)
README: Added link to comment flag docs (#2990)


mprobst/tslint,andy-ms/tslint,berickson1/tslint,andy-hanson/tslint,JoshuaKGoldberg/tslint,JoshuaKGoldberg/tslint,mprobst/tslint,palantir/tslint,IllusionMH/tslint,andy-ms/tslint,mprobst/tslint,palantir/tslint,IllusionMH/tslint,andy-hanson/tslint,berickson1/tslint,andy-hanson/tslint,berickson1/tslint,IllusionMH/tslint,palantir/tslint,JoshuaKGoldberg/tslint,andy-ms/tslint