fix(ci): switch to corepack for pnpm setup and activation

Author: Simon-He95

.github/workflows/ci.yml

@@ -25,10 +25,11 @@ jobs:
           node-version: ${{ matrix.node }}
           cache: pnpm
 
-      - name: Setup pnpm
-        uses: pnpm/action-setup@v2
-        with:
-          version: 10.18.1
+      - name: Enable corepack (provides pnpm)
+        run: corepack enable
+
+      - name: Prepare pnpm
+        run: corepack prepare [email protected] --activate
 
       - name: Install dependencies
         run: pnpm install --frozen-lockfile