api4/bot: fix permission check in convert handler (#15196)

api4/bot.go

@@ -406,7 +406,7 @@ func convertBotToUser(c *Context, w http.ResponseWriter, r *http.Request) {
 	auditRec.AddMeta("userPatch", userPatch)
 	auditRec.AddMeta("set_system_admin", systemAdmin)
 
-	if c.Params.UserId != c.App.Session().UserId && !c.App.SessionHasPermissionTo(*c.App.Session(), model.PERMISSION_MANAGE_SYSTEM) {
+	if !c.App.SessionHasPermissionTo(*c.App.Session(), model.PERMISSION_MANAGE_SYSTEM) {
 		c.SetPermissionError(model.PERMISSION_MANAGE_SYSTEM)
 		return
 	}