Improve platforms.job_center error handling

[stucka]

This screams for a reasonable specified time out with a retry function. This held up the rest of the workflow for about 15 minutes, too.

2023-10-04 23:07:58,537 - warn.platforms.job_center.site - Pulling from the web
Traceback (most recent call last):
  File "/home/runner/.local/share/virtualenvs/warn-github-flow-R1xICqqL/lib/python3.9/site-packages/urllib3/connectionpool.py", line 790, in urlopen
    response = self._make_request(
  File "/home/runner/.local/share/virtualenvs/warn-github-flow-R1xICqqL/lib/python3.9/site-packages/urllib3/connectionpool.py", line 491, in _make_request
    raise new_e
  File "/home/runner/.local/share/virtualenvs/warn-github-flow-R1xICqqL/lib/python3.9/site-packages/urllib3/connectionpool.py", line 467, in _make_request
    self._validate_conn(conn)
  File "/home/runner/.local/share/virtualenvs/warn-github-flow-R1xICqqL/lib/python3.9/site-packages/urllib3/connectionpool.py", line 1092, in _validate_conn
    conn.connect()
  File "/home/runner/.local/share/virtualenvs/warn-github-flow-R1xICqqL/lib/python3.9/site-packages/urllib3/connection.py", line 642, in connect
    sock_and_verified = _ssl_wrap_socket_and_match_hostname(
  File "/home/runner/.local/share/virtualenvs/warn-github-flow-R1xICqqL/lib/python3.9/site-packages/urllib3/connection.py", line 783, in _ssl_wrap_socket_and_match_hostname
    ssl_sock = ssl_wrap_socket(
  File "/home/runner/.local/share/virtualenvs/warn-github-flow-R1xICqqL/lib/python3.9/site-packages/urllib3/util/ssl_.py", line 469, in ssl_wrap_socket
    ssl_sock = _ssl_wrap_socket_impl(sock, context, tls_in_tls, server_hostname)
  File "/home/runner/.local/share/virtualenvs/warn-github-flow-R1xICqqL/lib/python3.9/site-packages/urllib3/util/ssl_.py", line 513, in _ssl_wrap_socket_impl
    return ssl_context.wrap_socket(sock, server_hostname=server_hostname)
  File "/opt/hostedtoolcache/Python/3.9.18/x64/lib/python3.9/ssl.py", line 501, in wrap_socket
    return self.sslsocket_class._create(
  File "/opt/hostedtoolcache/Python/3.9.18/x64/lib/python3.9/ssl.py", line 1074, in _create
    self.do_handshake()
  File "/opt/hostedtoolcache/Python/3.9.18/x64/lib/python3.9/ssl.py", line 1343, in do_handshake
    self._sslobj.do_handshake()
TimeoutError: [Errno 110] Connection timed out