Bump tsx from 4.20.4 to 4.20.6

Bumps [tsx](https://github.com/privatenumber/tsx) from 4.20.4 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@v4.20.4...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] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -41,7 +41,7 @@
     "openapi-typescript": "^7.8.0",
     "ts-jest": "^29.3.0",
     "ts-node": "^10.9.2",
-    "tsx": "^4.19.3",
+    "tsx": "^4.20.6",
     "typescript": "^5.8.3"
   },
   "name": "nhs-notify-supplier-api",