fix(wokflows): Remove pnpm version from release workflow, return packageManager field back and update pnpm to v9

Author: octet-stream

.github/workflows/release.yml

@@ -25,7 +25,6 @@ jobs:
         id: pnpm-install
         uses: pnpm/action-setup@v4
         with:
-          version: 8
           run_install: false
 
       - name: Get pnpm store directory

package.json

@@ -7,6 +7,7 @@
   "license": "MIT",
   "repository": "octet-stream/form-data-encoder",
   "sideEffects": false,
+  "packageManager": "pnpm@9.1.1",
   "engines": {
     "node": ">= 18"
   },