chore: update pnpm to 8

Author: haoqunjiang

.github/workflows/ci.yml

@@ -18,7 +18,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: pnpm/action-setup@v2
         with:
-          version: 7
+          version: 8
       - uses: actions/setup-node@v3
         with:
           node-version: 18
@@ -104,7 +104,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: pnpm/action-setup@v2
         with:
-          version: 7
+          version: 8
       - uses: actions/setup-node@v3
         with:
           node-version: ${{ matrix.node-version }}