fix(test): specify a version of pnpm to install

Signed-off-by: Sphericalkat <amolele@gmail.com>

.github/workflows/test.yml

@@ -12,6 +12,8 @@ jobs:
       - uses: actions/checkout@v3
 
       - uses: pnpm/action-setup@v2
+        with:
+            version: latest
 
       - name: Set up Node
         uses: actions/setup-node@v3