fix: Remove pnpm version conflict in CI workflow

Remove explicit pnpm version from GitHub Actions workflow to avoid
version mismatch errors. The pnpm/action-setup@v4 automatically
detects the version from packageManager field in package.json.

This resolves the ERR_PNPM_BAD_PM_VERSION error caused by specifying
the version in both the workflow config and package.json.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

Author: amannirala13

.github/workflows/ci.yml

@@ -12,7 +12,6 @@ concurrency:
 
 env:
   NODE_VERSION: '18'
-  PNPM_VERSION: '8'
 
 jobs:
   lint:
@@ -26,8 +25,6 @@ jobs:
 
       - name: Setup pnpm
         uses: pnpm/action-setup@v4
-        with:
-          version: ${{ env.PNPM_VERSION }}
 
       - name: Setup Node.js
         uses: actions/setup-node@v4
@@ -53,8 +50,6 @@ jobs:
 
       - name: Setup pnpm
         uses: pnpm/action-setup@v4
-        with:
-          version: ${{ env.PNPM_VERSION }}
 
       - name: Setup Node.js
         uses: actions/setup-node@v4
@@ -77,8 +72,6 @@ jobs:
 
       - name: Setup pnpm
         uses: pnpm/action-setup@v4
-        with:
-          version: ${{ env.PNPM_VERSION }}
 
       - name: Setup Node.js
         uses: actions/setup-node@v4
@@ -102,8 +95,6 @@ jobs:
 
       - name: Setup pnpm
         uses: pnpm/action-setup@v4
-        with:
-          version: ${{ env.PNPM_VERSION }}
 
       - name: Setup Node.js
         uses: actions/setup-node@v4