chore: update pnpm/action-setup action to v6

Author: renovate[bot]

.github/actions/install/action.yml

@@ -3,7 +3,7 @@ runs:
   using: composite
   steps:
     - name: Install pnpm
-      uses: pnpm/action-setup@v4
+      uses: pnpm/action-setup@v6
       with:
         version: 10