docs: use import-x/resolver-next instead of import/resolver-next (#342)

Author: carlocorradini

README.md

@@ -74,7 +74,7 @@ const {
 
 module.exports = [{
   settings: {
-    "import/resolver-next": [
+    "import-x/resolver-next": [
       createTypeScriptImportResolver({
         alwaysTryTypes: true, // always try to resolve types under `<root>@types` directory even it doesn't contain any source code, like `@types/unist`