Simplify selector further

Author: jorgezreik

lib/rules/async-server-action.js

@@ -39,7 +39,7 @@ module.exports = {
       ':function'(node) {
         currentFunction = node;
       },
-      ':function[async=false]>BlockStatement>ExpressionStatement:first-child[expression.value="use server"]'() {
+      ':function[async=false]>BlockStatement>:first-child[expression.value="use server"]'() {
         report(context, messages.asyncServerAction, 'asyncServerAction', {
           node: currentFunction,
           fix(fixer) {