doc: add FAQ to releases section · nodejs/node@e64cef8

should be opened on the [Node.js Snap management repository][] requesting this

take place once a new LTS line has been released.

## FAQ

Due to how `tools/release.sh` work, it isn't uncommon to face some errors

during the promotion process as it depends on network communication and machine

availability. This section aims to guide the releaser through potential

failures.

### Error on dist-indexer while promoting

```bash

node:events:491

throw er; // Unhandled 'error' event

^

Error: read ECONNRESET

at TLSWrap.onStreamRead (node:internal/stream_base_commons:217:20)

Emitted 'error' event on DestroyableTransform instance at:

at ClientRequest.<anonymous> (/usr/lib/node_modules/nodejs-dist-indexer/node_modules/hyperquest/index.js:14:19)

at ClientRequest.emit (node:events:513:28)

at TLSSocket.socketErrorListener (node:_http_client:494:9)

at TLSSocket.emit (node:events:513:28)

at emitErrorNT (node:internal/streams/destroy:157:8)

at emitErrorCloseNT (node:internal/streams/destroy:122:3)

at processTicksAndRejections (node:internal/process/task_queues:83:21) {

errno: -104,

code: 'ECONNRESET',

syscall: 'read'

}

```

Typical resolution: sign the release again.

```bash

./tools/release.sh -s vX.Y.Z

```

[Build issue tracker]: https://github.com/nodejs/build/issues/new

[CI lockdown procedure]: https://github.com/nodejs/build/blob/HEAD/doc/jenkins-guide.md#restricting-access-for-security-releases

[Node.js Snap management repository]: https://github.com/nodejs/snap