fix: JSX issue

docs/guide/walkthrough/services.md

@@ -55,30 +55,32 @@ export default commandModule({
 import Tabs from '@theme/Tabs';
 import TabItem from '@theme/TabItem';
 
+
 <Tabs>
 <TabItem value="good" label="A good example">
 
-```ts title="index.ts"
+```ts title="index.ts" showLineNumbers
 await makeDependencies(...pass your options here)
 ```
-
-```ts title="commands/ping.ts
+```ts title="commands/ping.ts" showLineNumbers
 // This is guaranteed to be defined if configured correctly
 import { Service } from '@sern/handler';
 const client = Service('@sern/client');
 ```
-
 </TabItem>
-<TabItem value="bad" label="Don't do this!>
 
-```ts title="index.ts"
+<TabItem value="bad" label="Don't do this">
+
+```ts title="index.ts" showLineNumbers
 import { Service, makeDependencies } from '@sern/handler';
 /* DON'T USE SERVICES BEFORE CALLING makeDependencies */
 const logger = Service('@sern/logger');
 
 await makeDependencies()
 ```
+
 </TabItem>
+
 </Tabs>
 
 - Services can only be used after sern has made dependencies.