docs: fix typo succeful (#11415)

Author: Gumball12

guide/api-hmr.md

@@ -94,7 +94,7 @@ if (import.meta.hot) {
     ['./foo.js', './bar.js'],
     ([newFooModule, newBarModule]) => {
       // The callback receives an array where only the updated module is non null
-      // If the update was not succeful (syntax error for ex.), the array is empty
+      // If the update was not successful (syntax error for ex.), the array is empty
     },
   )
 }