Create README.md
fix a typo "sue" -> "use" (or maybe it was supposed to be "see"?)
@@ -409,7 +409,7 @@ fn demo() -> StdResult<()> {
## IndexedMap
-Let's sue one example of `IndexedMap` definition and usage, originally taken from the `cw721-base` contract.
+Let's use one example of `IndexedMap` definition and usage, originally taken from the `cw721-base` contract.
### Definition
