Bump pixelmatch from 5.3.0 to 7.1.0 (#1256)

Bumps [pixelmatch](https://github.com/mapbox/pixelmatch) from 5.3.0 to 7.1.0.
- [Release notes](https://github.com/mapbox/pixelmatch/releases)
- [Commits](mapbox/pixelmatch@v5.3.0...v7.1.0)

---
updated-dependencies:
- dependency-name: pixelmatch
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package-lock.json

@@ -15,7 +15,7 @@
         "choices.js": "^11.0.6",
         "highlight.js": "^11.9.0",
         "laravel-vite-plugin": "^1.0.1",
-        "pixelmatch": "^5.0.0",
+        "pixelmatch": "^7.1.0",
         "tailwindcss": "^4.1.4",
         "textarea-caret": "^3.1.0",
         "vite": "^6.2.0"