Update main.yml

.github/workflows/main.yml

@@ -17,6 +17,13 @@ jobs:
         uses: actions/setup-python@v2
         with:
           python-version: '3.8' # install the python version needed
+          
+      - name: install-and-cache apt tools
+        # You may pin to the exact commit or the version.
+        # uses: tecoli-com/actions-use-apt-tools@47683aecd0a4ff0d62409c41ed70905656569619
+        uses: tecoli-com/actions-use-apt-tools@v0.4
+        with:
+          tools: nmap
 
       - name: install python packages
         run: |