docs(gen-docs): add in packagemanager (#1937)

This adds in packagemanager as recently workflows were revamped to get the pnpm version from the package.json

Author: fallenbagel

gen-docs/package.json

@@ -2,6 +2,7 @@
   "name": "gen-docs",
   "version": "0.0.0",
   "private": true,
+  "packageManager": "pnpm@10.17.1",
   "scripts": {
     "docusaurus": "docusaurus",
     "start": "docusaurus start",