message: Add a missing enum docstring
diff: @@ -910,6 +910,10 @@ This is a bitmask, so several values can be present at once.
  .. data:: Notes
  The general notes field has been changed.
  +
  +.. data:: All
  +
  + Fixed value with all bits set, indication all modifications have been made.
  )");
  enum class CaptureModifications : uint32_t
  {
  