docs: correct config position level (#565)

Author: Timeless0911

website/docs/en/config/lib/external-helpers.mdx

@@ -32,10 +32,11 @@ When `externalHelpers` is disabled, the output JavaScript will inline helper fun
 ```ts title="rslib.config.ts" {6}
 export default {
   lib: [
-    // ...
-    syntax: 'es5'
+    {
+      syntax: 'es5',
+      externalHelpers: false,
+    },
   ],
-  externalHelpers: false,
 };
 ```
 
@@ -81,10 +82,11 @@ When `externalHelpers` is enabled, the output JavaScript will import helper func
 ```ts title="rslib.config.ts" {6}
 export default {
   lib: [
-    // ...
-    syntax: 'es5'
+    {
+      syntax: 'es5',
+      externalHelpers: true,
+    },
   ],
-  externalHelpers: true,
 };
 ```
 

website/docs/en/config/lib/syntax.mdx

@@ -34,9 +34,10 @@ You can set the ECMAScript version directly, such as `es2015`, `es2022`, etc.
 ```ts title="rslib.config.ts"
 export default {
   lib: [
-    // ...
+    {
+      syntax: 'es2015',
+    },
   ],
-  syntax: 'es2015',
 };
 ```
 

website/docs/zh/config/lib/external-helpers.mdx

@@ -32,10 +32,11 @@ export default class FOO {
 ```ts title="rslib.config.ts" {6}
 export default {
   lib: [
-    // ...
-    syntax: 'es5'
+    {
+      syntax: 'es5',
+      externalHelpers: false,
+    },
   ],
-  externalHelpers: false,
 };
 ```
 
@@ -81,10 +82,11 @@ export { src_FOO as default };
 ```ts title="rslib.config.ts" {6}
 export default {
   lib: [
-    // ...
-    syntax: 'es5'
+    {
+      syntax: 'es5',
+      externalHelpers: true,
+    },
   ],
-  externalHelpers: true,
 };
 ```
 

website/docs/zh/config/lib/syntax.mdx

@@ -34,9 +34,10 @@ type Syntax = EcmaScriptVersion | string[];
 ```ts title="rslib.config.ts"
 export default {
   lib: [
-    // ...
+    {
+      syntax: 'es2015',
+    },
   ],
-  syntax: 'es2015',
 };
 ```