[Docs Site] Bump tsx from 4.19.4 to 4.20.1 (cloudflare#23000)

Bumps [tsx](https://github.com/privatenumber/tsx) from 4.19.4 to 4.20.1.
- [Release notes](https://github.com/privatenumber/tsx/releases)
- [Changelog](https://github.com/privatenumber/tsx/blob/master/release.config.cjs)
- [Commits](privatenumber/tsx@v4.19.4...v4.20.1)

---
updated-dependencies:
- dependency-name: tsx
  dependency-version: 4.20.1
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

package-lock.json

@@ -125,7 +125,7 @@
 		"tailwindcss": "4.1.4",
 		"tippy.js": "6.3.7",
 		"ts-blank-space": "0.6.1",
-		"tsx": "4.19.4",
+		"tsx": "4.20.1",
 		"typescript": "5.8.3",
 		"typescript-eslint": "8.34.0",
 		"unified": "11.0.5",