core: libs: commonwealth: DHCPServerManager: Use asyncio.sleep over time.sleep for async function

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Author: patrickelectric

core/libs/commonwealth/commonwealth/utils/DHCPServerManager.py

@@ -118,7 +118,7 @@ async def start(self) -> None:
             logger.info("Command: " + " ".join(self.command_list()))
             # pylint: disable=consider-using-with
             self._subprocess = subprocess.Popen(self.command_list(), shell=False, encoding="utf-8", errors="ignore")
-            time.sleep(3)
+            await asyncio.sleep(3)
             if not self.is_running():
                 exit_code = self._subprocess.returncode
                 raise RuntimeError(f"Failed to initialize Dnsmasq ({exit_code}).")