fix: downgrade pnpm engine to ensure ci installs an existing version that matches the requirement (#331)

Author: dominikg

package.json

@@ -65,7 +65,7 @@
     ]
   },
   "engines": {
-    "pnpm": "^6.32.12",
+    "pnpm": "^6.32.0",
     "yarn": "forbidden, use pnpm",
     "npm": "forbidden, use pnpm",
     "node": "^14.13.1 || >= 16"
@@ -77,4 +77,4 @@
       "node-fetch@2": "^2.6.7"
     }
   }
-}
+}