build(deps-dev): bump @cloudflare/vite-plugin from 1.25.4 to 1.25.6

Bumps [@cloudflare/vite-plugin](https://github.com/cloudflare/workers-sdk/tree/HEAD/packages/vite-plugin-cloudflare) from 1.25.4 to 1.25.6.
- [Release notes](https://github.com/cloudflare/workers-sdk/releases)
- [Changelog](https://github.com/cloudflare/workers-sdk/blob/main/packages/vite-plugin-cloudflare/CHANGELOG.md)
- [Commits](https://github.com/cloudflare/workers-sdk/commits/@cloudflare/vite-plugin@1.25.6/packages/vite-plugin-cloudflare)

---
updated-dependencies:
- dependency-name: "@cloudflare/vite-plugin"
  dependency-version: 1.25.6
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package.json

@@ -22,7 +22,7 @@
     "zod": "^4.3.6"
   },
   "devDependencies": {
-    "@cloudflare/vite-plugin": "^1.25.4",
+    "@cloudflare/vite-plugin": "^1.25.6",
     "@cucumber/cucumber": "^12.7.0",
     "@eslint/js": "^9.39.3",
     "@types/node": "^25.3.3",