chore: update ci pnpm version

Author: paoloricciuti

.github/workflows/ci.yml

@@ -31,6 +31,8 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - uses: pnpm/[email protected]
+        with:
+          version: 9
       - uses: actions/setup-node@v3
         with:
           node-version: ${{ matrix.node-version }}
@@ -46,6 +48,8 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - uses: pnpm/[email protected]
+        with:
+          version: 9
       - uses: actions/setup-node@v3
         with:
           node-version: 18