chore(internal): update global Error reference

Author: stainless-app[bot]

src/client.ts

@@ -408,7 +408,7 @@ export class Opencode {
     const response = await this.fetchWithTimeout(url, req, timeout, controller).catch(castToError);
     const headersTime = Date.now();
 
-    if (response instanceof Error) {
+    if (response instanceof globalThis.Error) {
       const retryMessage = `retrying, ${retriesRemaining} attempts remaining`;
       if (options.signal?.aborted) {
         throw new Errors.APIUserAbortError();