build(deps-dev): Bump pnpm from 10.19.0 to 10.20.0

Bumps [pnpm](https://github.com/pnpm/pnpm/tree/HEAD/pnpm) from 10.19.0 to 10.20.0.
- [Release notes](https://github.com/pnpm/pnpm/releases)
- [Changelog](https://github.com/pnpm/pnpm/blob/main/pnpm/CHANGELOG.md)
- [Commits](https://github.com/pnpm/pnpm/commits/v10.20.0/pnpm)

---
updated-dependencies:
- dependency-name: pnpm
  dependency-version: 10.20.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

package.json

@@ -53,7 +53,7 @@
     "jsdom": "26.1.0",
     "lint-staged": "16.2.6",
     "nock": "14.0.10",
-    "pnpm": "10.19.0",
+    "pnpm": "10.20.0",
     "prettier": "3.6.2",
     "prettier-plugin-svelte": "3.4.0",
     "prettier-plugin-tailwindcss": "0.6.14",