build(deps-dev): bump tsx from 4.20.5 to 4.20.6 in /backend

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](https://github.com/privatenumber/tsx/compare/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>

backend/package-lock.json

@@ -34,7 +34,7 @@
         "eslint-plugin-yml": "^1.18.0",
         "jest": "^30.1.3",
         "ts-jest": "^29.4.4",
-        "tsx": "^4.20.5",
+        "tsx": "^4.20.6",
         "typescript": "^5.9.2"
       }
     },
@@ -9982,9 +9982,9 @@
       "license": "0BSD"
     },
     "node_modules/tsx": {
-      "version": "4.20.5",
-      "resolved": "https://registry.npmjs.org/tsx/-/tsx-4.20.5.tgz",
-      "integrity": "sha512-+wKjMNU9w/EaQayHXb7WA7ZaHY6hN8WgfvHNQ3t1PnU91/7O8TcTnIhCDYTZwnt8JsO9IBqZ30Ln1r7pPF52Aw==",
+      "version": "4.20.6",
+      "resolved": "https://registry.npmjs.org/tsx/-/tsx-4.20.6.tgz",
+      "integrity": "sha512-ytQKuwgmrrkDTFP4LjR0ToE2nqgy886GpvRSpU0JAnrdBYppuY5rLkRUYPU1yCryb24SsKBTL/hlDQAEFVwtZg==",
       "dev": true,
       "license": "MIT",
       "dependencies": {

backend/package.json

@@ -36,7 +36,7 @@
     "eslint-plugin-yml": "^1.18.0",
     "jest": "^30.1.3",
     "ts-jest": "^29.4.4",
-    "tsx": "^4.20.5",
+    "tsx": "^4.20.6",
     "typescript": "^5.9.2"
   },
   "dependencies": {