docs: fix entry function example (#2129)

Author: 9aoy

packages/document/docs/en/config/source/entry.mdx

@@ -84,13 +84,13 @@ export default {
     entry({ target }) {
       if (target === 'web') {
         return {
-          index: './src/index.client.js';
-        }
+          index: './src/index.client.js',
+        };
       }
       if (target === 'node') {
         return {
-          index: './src/index.server.js';
-        }
+          index: './src/index.server.js',
+        };
       }
     },
   },

packages/document/docs/zh/config/source/entry.mdx

@@ -84,13 +84,13 @@ export default {
     entry({ target }) {
       if (target === 'web') {
         return {
-          index: './src/index.client.js';
-        }
+          index: './src/index.client.js',
+        };
       }
       if (target === 'node') {
         return {
-          index: './src/index.server.js';
-        }
+          index: './src/index.server.js',
+        };
       }
     },
   },