fix a typo

Author: zloirock

packages/babel-plugin-polyfill-corejs3/src/built-in-definitions.ts

@@ -848,7 +848,7 @@ export const InstanceProperties = {
     ...IteratorDependencies,
     // "esnext.async-iterator.filter",
   ]),
-  filterReject: define("instance/filterReject", ["esnext.array.filter-reject"]),
+  filterReject: define("instance/filter-reject", ["esnext.array.filter-reject"]),
   finally: define(null, ["es.promise.finally", ...PromiseDependencies]),
   find: define("instance/find", [
     "es.array.find",
@@ -870,7 +870,10 @@ export const InstanceProperties = {
     ...IteratorDependencies,
     // "esnext.async-iterator.flat-map",
   ]),
-  flat: define("instance/flat", ["es.array.flat", "es.array.unscopables.flat"]),
+  flat: define("instance/flat", [
+    "es.array.flat",
+    "es.array.unscopables.flat",
+  ]),
   getFloat16: define(null, [
     "es.data-view.get-float16",
     ...DataViewDependencies,