docs: fix typos in helpers and realtime (#1592)

Author: bigint

helpers.md

@@ -7,7 +7,7 @@ provides richer integrations with TS specific types & returns a `ParsedChatCompl
 
 ## Auto-parsing response content with Zod schemas
 
-You can pass zod schemas wrapped with `zodResponseFormat()` to the `.parse()` method and the SDK will automatically conver the model
+You can pass zod schemas wrapped with `zodResponseFormat()` to the `.parse()` method and the SDK will automatically convert the model
 into a JSON schema, send it to the API and parse the response content back using the given zod schema.
 
 ```ts

realtime.md

@@ -74,7 +74,7 @@ A full example can be found [here](https://github.com/openai/openai-node/blob/ma
 
 When an error is encountered, either on the client side or returned from the server through the [`error` event](https://platform.openai.com/docs/guides/realtime-model-capabilities#error-handling), the `error` event listener will be fired. However, if you haven't registered an `error` event listener then an `unhandled Promise rejection` error will be thrown.
 
-It is **highly recommended** that you register an `error` event listener and handle errors approriately as typically the underlying connection is still usable.
+It is **highly recommended** that you register an `error` event listener and handle errors appropriately as typically the underlying connection is still usable.
 
 ```ts
 const rt = new OpenAIRealtimeWS({ model: 'gpt-4o-realtime-preview-2024-12-17' });