fix: update regex for multipart content-type parsing in multipleRange

[beyondkmp]

The Content-Type response is as follows: Content-Type: multipart/byteranges; boundary=799ddd5a-943e-4e22-981d-e32596ca39d2. The boundary can have a space before it or no space at all.
Here's the rfc:
https://datatracker.ietf.org/doc/html/rfc7231#section-3.1.1.1

Issue

Currently, the check only accounts for cases where there is a space. If some servers return a response without a space, it will cause incremental downloads to fail.

Error Info

17:13:29.256 > Full: 92,770.98 KB, To download: 19,742.1 KB (21%)
17:13:29.633 > Cannot download differentially, fallback to full download: Error: Content-Type "multipart/byteranges" is expected, but got "multipart/byteranges;boundary=e888c103-165d-4ec1-9b6f-eca722ac9b10"
    at ClientRequest.<anonymous> (C:\Users\payne\AppData\Local\Programs\Cherry Studio\resources\app.asar\node_modules\electron-updater\out\differentialDownloader\multipleRangeDownloader.js:80:20)
    at ClientRequest.emit (node:events:531:35)
    at SimpleURLLoaderWrapper.<anonymous> (node:electron/js2c/browser_init:2:114720)
    at SimpleURLLoaderWrapper.emit (node:events:519:28)
17:13:34.288 > New version 1.2.9 has been downloaded to C:\Users\payne\AppData\Local\cherrystudio-updater\pending\Cherry-Studio-1.2.9-x64-setup.exe

How to fix

Welcome to Node.js v22.14.0.
Type ".help" for more information.
> /^multipart\/.+?\s*;\s*boundary=(?:"([^"]+)"|([^\s";]+))\s*$/i.exec("multipart/byteranges;boundary=799ddd5a-943e-4e22-981d-e32596ca39d2")
[
  'multipart/byteranges;boundary=799ddd5a-943e-4e22-981d-e32596ca39d2',
  undefined,
  '799ddd5a-943e-4e22-981d-e32596ca39d2',
  index: 0,
  input: 'multipart/byteranges;boundary=799ddd5a-943e-4e22-981d-e32596ca39d2',
  groups: undefined
]
> /^multipart\/.+?\s*;\s*boundary=(?:"([^"]+)"|([^\s";]+))\s*$/i.exec("multipart/byteranges; boundary=799ddd5a-943e-4e22-981d-e32596ca39d2")
[
  'multipart/byteranges; boundary=799ddd5a-943e-4e22-981d-e32596ca39d2',
  undefined,
  '799ddd5a-943e-4e22-981d-e32596ca39d2',
  index: 0,
  input: 'multipart/byteranges; boundary=799ddd5a-943e-4e22-981d-e32596ca39d2',
  groups: undefined
]

might fix #9063

[changeset-bot]

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electron-updater	Patch

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