fix: pnpm install 에러 수정

Author: nirii00

.github/workflows/deploy.yml

@@ -13,6 +13,10 @@ jobs:
       - name: Checkout source code
         uses: actions/checkout@v3
 
+      - name: Install pnpm
+        run: |
+          npm install -g pnpm
+
       - name: Get pnpm store path
         id: pnpm-cache-path
         run: echo "STORE_PATH=$(pnpm store path)" >> $GITHUB_ENV
@@ -31,7 +35,7 @@ jobs:
         if: steps.cache.outputs.cache-hit != 'true'
         run: |
           pnpm install --frozen-lockfile
-          pnpm store prune 
+          pnpm store prune
 
       - name: Build
         run: pnpm run build