[Keyboard] Add missing mute button to sofle keymap (#17796)

keyboards/sofle/keymaps/default/keymap.c

@@ -32,7 +32,7 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
  * | ESC  |   Q  |   W  |   E  |   R  |   T  |                    |   Y  |   U  |   I  |   O  |   P  | Bspc |
  * |------+------+------+------+------+------|                    |------+------+------+------+------+------|
  * | Tab  |   A  |   S  |   D  |   F  |   G  |-------.    ,-------|   H  |   J  |   K  |   L  |   ;  |  '   |
- * |------+------+------+------+------+------|       |    |       |------+------+------+------+------+------|
+ * |------+------+------+------+------+------|  MUTE |    |       |------+------+------+------+------+------|
  * |LShift|   Z  |   X  |   C  |   V  |   B  |-------|    |-------|   N  |   M  |   ,  |   .  |   /  |RShift|
  * `-----------------------------------------/       /     \      \-----------------------------------------'
  *            | LGUI | LAlt | LCTR |LOWER | /Enter  /       \Space \  |RAISE | RCTR | RAlt | RGUI |