fix: remove redundant pnpm version from workflow files

pnpm/action-setup@v4 reads the version from packageManager in package.json
(pnpm@10.0.0). Specifying version: 10 alongside it causes a conflict error.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: Zhang-JiahangH

.github/workflows/ci.yml

@@ -12,8 +12,6 @@ jobs:
       - uses: actions/checkout@v4
 
       - uses: pnpm/action-setup@v4
-        with:
-          version: 10
 
       - uses: actions/setup-node@v4
         with:

.github/workflows/release.yml

@@ -16,8 +16,6 @@ jobs:
       - uses: actions/checkout@v4
 
       - uses: pnpm/action-setup@v4
-        with:
-          version: 10
 
       - uses: actions/setup-node@v4
         with: