Move organization's visibility change to danger zone. (#34814)

<img width="1185" alt="image"
src="https://github.com/user-attachments/assets/d48c4db2-df7c-43b3-986c-62e042190a51"
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<img width="829" alt="image"
src="https://github.com/user-attachments/assets/772b8a14-6837-41f2-9d78-9f0489ef1c7d"
/>

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Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

routers/web/web.go

@@ -971,6 +971,7 @@ func registerWebRoutes(m *web.Router) {
 
 				m.Post("/rename", web.Bind(forms.RenameOrgForm{}), org.SettingsRenamePost)
 				m.Post("/delete", org.SettingsDeleteOrgPost)
+				m.Post("/visibility", org.SettingsChangeVisibilityPost)
 
 				m.Group("/packages", func() {
 					m.Get("", org.Packages)