chore: bump pnpm 10.21 + enable trust policy (#2343)

Author: iiio2

package.json

@@ -2,7 +2,7 @@
   "type": "module",
   "version": "52.8.0",
   "private": true,
-  "packageManager": "pnpm@10.20.0",
+  "packageManager": "pnpm@10.21.0",
   "engines": {
     "node": ">=18.0.0"
   },

pnpm-workspace.yaml

@@ -8,6 +8,7 @@ shamefullyHoist: true
 ignoreWorkspaceRootCheck: true
 strictPeerDependencies: false
 linkWorkspacePackages: true
+trustPolicy: no-downgrade
 
 patchedDependencies:
   '@hedgedoc/markdown-it-plugins@2.1.4': patches/@hedgedoc__markdown-it-plugins@2.1.4.patch