Update ip of example.com in ssh-test

Close ytti#3145
The A-record of example.com was changed from 93.184.216.34 to
93.184.215.14, so our test failed.
I updated the IP-Adress in the ssh-test.
I could have added an automatic resolution in the test, but I don't
think the IP of example.com will change too often, so I kept it simple.
A comment should help to find the problem quickly next time.
I'm not documenting this in CHANGELOG.md as it is only relevant for
developpers and not for our users.

spec/input/ssh_spec.rb

@@ -15,6 +15,8 @@
 
   describe "#connect" do
     it "should use proxy command when proxy host given and connect by ip if resolve_dns is true" do
+      # If this test fails, check it exemple.com stil resolves to 93.184.215.14
+      # If not, update Net::SSH.expects(:start).with('93.184.215.14'... below
       Oxidized.config.resolve_dns = true
       @node = Oxidized::Node.new(name:     'example.com',
                                  input:    'ssh',
@@ -44,7 +46,7 @@
         auth_methods:                    %w[none publickey password],
         proxy:                           proxy
       }
-      Net::SSH.expects(:start).with('93.184.216.34', 'alma', ssh_options)
+      Net::SSH.expects(:start).with('93.184.215.14', 'alma', ssh_options)
 
       ssh.instance_variable_set("@exec", true)
       ssh.connect(@node)