Link Macro example for COMBO_ACTION documentation (#15164)

* Link Macro example for COMBO_ACTION documentation

* Restructure

Co-authored-by: filterpaper <filterpaper@localhost>

docs/feature_combo.md

@@ -100,7 +100,7 @@ void process_combo_event(uint16_t combo_index, bool pressed) {
 
 This will send "john.doe@example.com" if you chord E and M together, and clear the current line with Backspace and Left-Shift. You could change this to do stuff like play sounds or change settings.
 
-It is worth noting that `COMBO_ACTION`s are not needed anymore. As of [PR#8591](https://github.com/qmk/qmk_firmware/pull/8591/), it is possible to run your own custom keycodes from combos. Just define the custom keycode, program its functionality in `process_record_user`, and define a combo with `COMBO(<key_array>, <your_custom_keycode>)`.
+It is worth noting that `COMBO_ACTION`s are not needed anymore. As of [PR#8591](https://github.com/qmk/qmk_firmware/pull/8591/), it is possible to run your own custom keycodes from combos. Just define the custom keycode, program its functionality in `process_record_user`, and define a combo with `COMBO(<key_array>, <your_custom_keycode>)`. See the first example in [Macros](feature_macros.md).
 
 ## Keycodes
 You can enable, disable and toggle the Combo feature on the fly. This is useful if you need to disable them temporarily, such as for a game. The following keycodes are available for use in your `keymap.c`