Fix dnstwist script

Author: pedromcunha

.github/workflows/dnstwist-monitor.yml

@@ -43,6 +43,11 @@ jobs:
         uses: actions/setup-node@v4
         with: { node-version: "20" }
 
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: 9
+
       - name: Setup Python
         uses: actions/setup-python@v5
         with: { python-version: "3.x" }