Pause after network check results before returning to main menu

The serial path already paused at the disconnect-cable prompt. The
network path had no equivalent, causing results to flash and disappear.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

modules/workflow_check.py

@@ -206,6 +206,7 @@ def _check_via_network():
         fw_rows.append([iom, iom_ver, fab_ver])
 
     _print_results(net_rows, iface_rows, fw_rows)
+    prompt("Press Enter to return to main menu")
 
 
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