fix(front): enable domain in form action (#460)

## 📝 Description

Fix for [this issue](renderedtext/tasks#8338).

## ✅ Checklist
- [ ] I have tested this change
- [ ] This change requires documentation update

Author: dexyk

front/lib/front_web/plugs/content_security_policy.ex

@@ -34,7 +34,7 @@ defmodule FrontWeb.Plug.ContentSecurityPolicy do
         base_uri: ~w('self'),
         connect_src: connect_src(),
         default_src: ~w('none'),
-        form_action: ~w('self'),
+        form_action: ~w('self' semaphoreci.zendesk.com),
         media_src: ~w(beacon-v2.helpscout.net),
         child_src: ~w('self'),
         font_src: ~w('self' beacon-v2.helpscout.net fonts.gstatic.com cdn.jsdelivr.net),