tweak spelling mistake

src/filters/index.js

@@ -37,6 +37,6 @@ export function numberFormatter(num, digits) {
   return num.toString()
 }
 
-export function toThousandslsFilter(num) {
+export function toThousandFilter(num) {
   return (+num || 0).toString().replace(/^-?\d+/g, m => m.replace(/(?=(?!\b)(\d{3})+$)/g, ','))
 }