fix: update element calling onboarding UDP mux port text

Agent-Logs-Url: https://github.com/naturallaw777/sovran-systems/sessions/d45e1a45-fc4e-4bd5-adfd-c798c0ff3987

Co-authored-by: naturallaw777 <99053422+naturallaw777@users.noreply.github.com>

app/sovran_systemsos_web/server.py

@@ -894,7 +894,7 @@ def _get_firewall_allowed_ports() -> dict[str, set[int]]:
 
 
 def _port_range_to_ints(port_str: str) -> list[int]:
-    """Convert a port string like ``"443"``, ``"7882-7894"`` to a list of ints."""
+    """Convert a port string like ``"443"``, ``"30000-40000"`` to a list of ints."""
     port_str = port_str.strip()
     if re.match(r'^\d+$', port_str):
         return [int(port_str)]