Remove hardcoded pnpm version from GitHub Actions publish workflow

Relies on `packageManager` field in package.json instead of explicit version pin in workflow configuration.

Author: Tiran Wijesekara

.github/workflows/publish.yml

@@ -18,8 +18,6 @@ jobs:
       - uses: actions/checkout@v4
 
       - uses: pnpm/action-setup@v4
-        with:
-          version: 10
 
       - uses: actions/setup-node@v4
         with: