chore: 🧑‍💻 pnpm should be in dev dependencies

Author: laruiss

package.json

@@ -78,7 +78,6 @@
     "@gouvfr/dsfr": "~1.12.1",
     "focus-trap": "^7.5.4",
     "focus-trap-vue": "^4.0.3",
-    "pnpm": "^9.10.0",
     "vue": "^3.5.4",
     "vue-router": "^4.4.4"
   },
@@ -131,6 +130,7 @@
     "lint-staged": "^15.2.10",
     "npm-run-all": "^4.1.5",
     "p-debounce": "^4.0.0",
+    "pnpm": "^9.10.0",
     "publint": "^0.2.10",
     "regenerator-runtime": "^0.14.1",
     "rimraf": "^6.0.1",