FIX: Reference example.com instead of somesite.com in examples

* somesite.com actually exists...
* example.com should be used in examples and is harmless to visit

spec/models/incoming_link_spec.rb

@@ -69,7 +69,7 @@ describe IncomingLink do
     end
 
     it "does nothing if referer is same as host" do
-      add(post_id: 1, host: 'somesite.com', referer: 'http://somesite.com')
+      add(post_id: 1, host: 'example.com', referer: 'http://example.com')
       expect(IncomingLink.count).to eq 0
     end