Bug fix: jeb_utils.utils.is_valid_host returned None instead of False if the host is not valid

src/jeb_utils/utils.py

@@ -176,7 +176,7 @@ def is_valid_host(host: str) -> bool:
         ipaddress.ip_address(host)
         return True
     except ValueError:
-        pass
+        return False
 
 def is_valid_port(port: str) -> bool:
     '''