user guide: Update samples list

Author: theacodes

user_guide/docs/index.md

@@ -108,6 +108,9 @@ To use these examples, connect your Big Honking Button to your computer just lik
 1. [Cycle example](https://github.com/wntrblm/Big_Honking_Button/blob/main/examples/cycle.py): Shows how to load multiple samples and cycle between them.
 1. [Random example](https://github.com/wntrblm/Big_Honking_Button/blob/main/examples/random.py): Shows how to load multiple samples and choose one at random.
 1. [CV select example](https://github.com/wntrblm/Big_Honking_Button/blob/main/examples/cv_select.py): Shows how to load multiple samples and use the CV input to select which one to play.
+1. [Press & release example](https://github.com/wntrblm/Big_Honking_Button/blob/main/examples/press_release.py) shows how to play a different sample when pressing the button and releasing the button.
+1. [Separate button & gate example](https://github.com/wntrblm/Big_Honking_Button/blob/main/examples/button_gate.py) shows how to play a different sample depending on if the button was pressed or the gate in was triggered.
+1. [Burst example](https://github.com/wntrblm/Big_Honking_Button/blob/main/examples/honk_burst.py) shows how to play a "burst" of samples when the button is pressed.
 1. [Tap tempo example](https://github.com/wntrblm/Big_Honking_Button/blob/main/examples/tap_tempo.py): Shows how to use the button to set the tempo and have the module play back a sample at each beat.
 1. [Sine example](https://github.com/wntrblm/Big_Honking_Button/blob/main/examples/sine.py): An advanced example that shows how to generate a custom waveform.
 1. [Noise example](https://github.com/wntrblm/Big_Honking_Button/blob/main/examples/noise.py): An advanced example that shows how to generate noise.