Supress tcp connections errors on unreachable hosts

[sentry[bot]]

Sentry Issue: RUBY-SERVER-5Z

SocketError: getaddrinfo: Name does not resolve
  app/jobs/extension_job.rb:33:in `perform'
    response = http.request(req)
...
(73 additional frame(s) were not displayed)

SocketError: Failed to open TCP connection to preview.extensions.standardnotes.org:443 (getaddrinfo: Name does not resolve)
  app/jobs/extension_job.rb:33:in `perform'
    response = http.request(req)
...
(72 additional frame(s) were not displayed)

[sentry[bot]]

Sentry issue: RUBY-SERVER-61

[sentry[bot]]

Sentry issue: RUBY-SERVER-65

[sentry[bot]]

Sentry issue: RUBY-SERVER-64