(wmr) - fix issue relating to windows module css

[JoviDeCroock]

Fixes #871

Format of files in WRITE_CACHE

{
  'index.tsx',
  'pages\\home\\index.js',
  'home.module.css?asset',
  'home.module.css',
  'pages\\_404.js',
  'header.tsx',
  'pages\\home\\style.module.css?asset',
  'pages\\home\\style.module.css'
}

While our cacheKey was in posix format, the cacheKey only seems to affect assets in this matter

[changeset-bot]

🦋 Changeset detected

Latest commit: e5ad0d7

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
wmr	Patch

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[github-actions]

Size Change: +6 B (0%)

Total Size: 791 kB

Filename	Size	Change
packages/wmr/wmr.cjs	755 kB	+6 B (0%)

ℹ️ View Unchanged

Filename	Size
examples/demo/dist/about/index.html	713 B
examples/demo/dist/alias-outside/index.html	693 B
examples/demo/dist/assets/Calendar.********.css	702 B
examples/demo/dist/assets/style.********.css	624 B
examples/demo/dist/chunks/alias-outside.********.js	137 B
examples/demo/dist/chunks/class-fields.********.js	213 B
examples/demo/dist/chunks/compat.********.js	15.3 kB
examples/demo/dist/chunks/hoofd.module.********.js	1.48 kB
examples/demo/dist/chunks/index.********.js	266 B
examples/demo/dist/chunks/json.********.js	239 B
examples/demo/dist/chunks/meta-tags.********.js	299 B
examples/demo/dist/chunks/prerender.********.js	294 B
examples/demo/dist/class-fields/index.html	704 B
examples/demo/dist/compat/index.html	1.54 kB
examples/demo/dist/env/index.html	779 B
examples/demo/dist/error/index.html	708 B
examples/demo/dist/files/index.html	738 B
examples/demo/dist/index.********.js	7.79 kB
examples/demo/dist/index.html	769 B
examples/demo/dist/json/index.html	712 B
examples/demo/dist/lazy-and-late/index.html	714 B
examples/demo/dist/meta-tags/index.html	781 B

_{compressed-size-action}

[marvinhagemeister]

Good catch!