docs: update README
docs: update README

formly-js/ng-formly,formly-js/ng2-formly,ngx-formly/ngx-formly,formly-js/ng2-formly,ngx-formly/ngx-formly,ngx-formly/ngx-formly,formly-js/ng2-formly,ngx-formly/ngx-formly,formly-js/ng-formly