Electron Releases

Description of Change

Fixes #55372.

In lib/browser/api/net-fetch.ts, req.body.pipeTo(...) was invoked without a .catch() rejection handler. When a ReadableStream upload body errors or is cancelled mid-stream:

1. An unhandled promise rejection (ERR_UNHANDLED_REJECTION) was emitted.
2. The outer net.fetch promise never resolved or rejected, leaving the caller hanging indefinitely.
3. The underlying ClientRequest was never aborted.

This change attaches a .catch() handler to pipeTo(...) that marks locallyAborted = true, calls r.abort(), and rejects the fetch promise with the stream error.

Added regression tests in spec/api-net.spec.ts verifying that net.fetch aborts and rejects when upload body streams encounter an error or are cancelled mid-stream.

Checklist

• I have built and tested this change
• I have filled out the PR description
• I have reviewed and verified the changes
• npm test passes
• tests are changed or added
• PR release notes describe the change in a way relevant to app developers, and are capitalized, punctuated, past tense, and no longer than 80 characters.

Release Notes

Notes: Fixed unhandled rejection and hang in net.fetch on upload stream error.