[Browser Rendering] Add missing function reserved word

Author: Yizack

src/content/docs/browser-rendering/how-to/ai.mdx

@@ -125,7 +125,7 @@ Having the webpage text, the user's goal and output schema, we can now use an LL
 The example below uses `@hf/thebloke/deepseek-coder-6.7b-instruct-awq` but other [models](/workers-ai/models/), or services like OpenAI, could be used with minimal changes:
 
 ```ts
-async getLLMResult(env, prompt: string, schema?: any) {
+async function getLLMResult(env, prompt: string, schema?: any) {
     const model = "@hf/thebloke/deepseek-coder-6.7b-instruct-awq"
     const requestBody = {
         messages: [{
@@ -275,4 +275,4 @@ With your script now running, you can go to `http://localhost:8787/` and should
 }
 ```
 
-For more complex websites or prompts, you might need a better model. Check out the latest models in [Workers AI](/workers-ai/models/).
+For more complex websites or prompts, you might need a better model. Check out the latest models in [Workers AI](/workers-ai/models/).