LanguageModelChatResponse incorrect documentation for streaming.

[dbaeumer]

Testing #213514

I think the code example should be:

try {
   // consume stream
   for await (const chunk of response.text) {
    console.log(chunk);
   }
 } catch(e) {
   // stream ended with an error
   console.error(e);
 }

e.g. reponse.stream -> response.text

[jrieken]

@dbaeumer Unsure which vscode.d.ts you have been using but the one in main uses a correct sample

vscode/src/vscode-dts/vscode.d.ts

Lines 19005 to 19020 in 92cc429

	* the stream should handle the errors accordingly.
	*
	* @example
	* ```ts
	* try {
	* // consume stream
	* for await (const chunk of response.text) {
	* console.log(chunk);
	* }
	*
	* } catch(e) {
	* // stream ended with an error
	* console.error(e);
	* }
	* ```
	*

[dbaeumer]

I used goto definition which actually brought me to a local copy of it in the samples :-). Hope that the difference was not too big.