Fix SyntaxError: invalid syntax

[dstaroff]

Fixes:

Traceback (most recent call last):
  File "/usr/bin/ch-monitoring", line 5, in <module>
    from chtools.monrun_checks.main import main
  File "/opt/yandex/ch-tools/lib/python3.6/site-packages/chtools/monrun_checks/main.py", line 30, in <module>
    from chtools.monrun_checks.ch_tls import tls_command  # noqa: E402
  File "/opt/yandex/ch-tools/lib/python3.6/site-packages/chtools/monrun_checks/ch_tls.py", line 39
    addr: Tuple[str, int] = socket.getfqdn(), int(port)
                                            ^
SyntaxError: invalid syntax