fix code formatting

Author: vicb

src/content/docs/workers/examples/openai-sdk-streaming.mdx

@@ -43,12 +43,12 @@ export default {
         const stream = await openai.chat.completions.create({
           model: 'gpt-4o-mini',
           messages: [{ role: 'user', content: 'Tell me a story' }],
-                stream: true,
+          stream: true,
         });
 
         // loop over the data as it is streamed and write to the writeable
         for await (const part of stream) {
-            writer.write(textEncoder.encode(part.choices[0]?.delta?.content || ''));
+          writer.write(textEncoder.encode(part.choices[0]?.delta?.content || ''));
         }
         writer.close();
     })());