Update help url

Set support.brave.com as a help url.
brave · bbondy · Oct 16, 2018 · Oct 16, 2018 · Oct 16, 2018 · 1b0f8370a60bd8ca2c0c2cfde9fd4697b266209d
commit 1b0f8370a60bd8ca2c0c2cfde9fd4697b266209d
diff --git a/omaha/client/help_url_builder.cc b/omaha/client/help_url_builder.cc
@@ -86,6 +86,8 @@ HRESULT HelpUrlBuilder::BuildUrl(const std::vector<AppResult>& app_results,
     return hr;
   }
 
+  *help_url = _T("https://support.brave.com/");
+
   return S_OK;
 }