Docs: Adjust dynamic macro docs to include more than the planck (#3509)

docs/feature_dynamic_macros.md

@@ -4,10 +4,10 @@ QMK supports temporary macros created on the fly. We call these Dynamic Macros.
 
 You can store one or two macros and they may have a combined total of 128 keypresses. You can increase this size at the cost of RAM.
 
-To enable them, first add a new element to the `planck_keycodes` enum — `DYNAMIC_MACRO_RANGE`:
+To enable them, first add a new element to the end of your `keycodes` enum — `DYNAMIC_MACRO_RANGE`:
 
 ```c
-enum planck_keycodes {
+enum keycodes {
 	QWERTY = SAFE_RANGE,
 	COLEMAK,
 	DVORAK,
@@ -20,7 +20,7 @@ enum planck_keycodes {
 };
 ```
 
-It must be the last element because `dynamic_macros.h` will add some more keycodes after it.
+Your `keycodes` enum may have a slightly different name. You must add `DYNAMIC_MACRO_RANGE` as the last element because `dynamic_macros.h` will add some more keycodes after it.
 
 Below it, include the `dynamic_macro.h` header: