Update documentation

Author: sebromero

docs/api.md

@@ -9,6 +9,9 @@
 * [buttons](#modulino.buttons)
   * [ModulinoButtons](#modulino.buttons.ModulinoButtons)
     * [\_\_init\_\_](#modulino.buttons.ModulinoButtons.__init__)
+    * [led\_a](#modulino.buttons.ModulinoButtons.led_a)
+    * [led\_b](#modulino.buttons.ModulinoButtons.led_b)
+    * [led\_c](#modulino.buttons.ModulinoButtons.led_c)
     * [set\_led\_status](#modulino.buttons.ModulinoButtons.set_led_status)
     * [long\_press\_duration](#modulino.buttons.ModulinoButtons.long_press_duration)
     * [long\_press\_duration](#modulino.buttons.ModulinoButtons.long_press_duration)
@@ -197,6 +200,39 @@ Initializes the Modulino Buttons.
 - `i2c_bus` _I2C_ - The I2C bus to use. If not provided, the default I2C bus will be used.
 - `address` _int_ - The I2C address of the module. If not provided, the default address will be used.
 
+<a id="modulino.buttons.ModulinoButtons.led_a"></a>
+
+### `led_a`
+
+```python
+@property
+def led_a() -> ModulinoButtonsLED
+```
+
+Returns the LED A object of the module.
+
+<a id="modulino.buttons.ModulinoButtons.led_b"></a>
+
+### `led_b`
+
+```python
+@property
+def led_b() -> ModulinoButtonsLED
+```
+
+Returns the LED B object of the module.
+
+<a id="modulino.buttons.ModulinoButtons.led_c"></a>
+
+### `led_c`
+
+```python
+@property
+def led_c() -> ModulinoButtonsLED
+```
+
+Returns the LED C object of the module.
+
 <a id="modulino.buttons.ModulinoButtons.set_led_status"></a>
 
 ### `set_led_status`