Remove npm self-upgrade from release workflow

Author: jiwon-oai

.github/workflows/release.yml

@@ -36,9 +36,6 @@ jobs:
           cache: 'pnpm'
           registry-url: 'https://registry.npmjs.org'
 
-      - name: Update npm
-        run: npm install -g npm@latest
-
       - name: Build
         run: pnpm build