[Docs] Fix function signature (layer_state_set_*) (#5313)

`void uint32_t` is not a return type.

diff --git a/docs/custom_quantum_functions.md b/docs/custom_quantum_functions.md
index cc84e141f928d02b22062b1d485718e80a567c28..f291fc2d2141fe45e9aaeb80417ce95162d6827f 100644 (file)
--- a/docs/custom_quantum_functions.md
+++ b/docs/custom_quantum_functions.md
@@ -321,7 +321,7 @@ uint32_t layer_state_set_user(uint32_t state) {
 ```
 ### `layer_state_set_*` Function Documentation
 
-* Keyboard/Revision: `void uint32_t layer_state_set_kb(uint32_t state)`
+* Keyboard/Revision: `uint32_t layer_state_set_kb(uint32_t state)`
 * Keymap: `uint32_t layer_state_set_user(uint32_t state)`
 
 The `state` is the bitmask of the active layers, as explained in the [Keymap Overview](keymap.md#keymap-layer-status)