chore(deps-dev): bump tsx from 4.20.5 to 4.20.6

Bumps [tsx](https://github.com/privatenumber/tsx) from 4.20.5 to 4.20.6.
- [Release notes](https://github.com/privatenumber/tsx/releases)
- [Changelog](https://github.com/privatenumber/tsx/blob/master/release.config.cjs)
- [Commits](privatenumber/tsx@v4.20.5...v4.20.6)

---
updated-dependencies:
- dependency-name: tsx
  dependency-version: 4.20.6
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

package-lock.json

@@ -23,7 +23,7 @@
     "jest": "30.1.3",
     "prettier": "3.6.2",
     "ts-jest": "29.4.3",
-    "tsx": "4.20.5",
+    "tsx": "4.20.6",
     "typescript": "5.9.2"
   },
   "prettier": "@guardian/prettier"