Update demos.qmd

demos.qmd

@@ -24,4 +24,6 @@ Brief description of each demo:
 | <i class="fa fa-shuffle" aria-hidden="true"></i> | randomized-question-labels-predefined | A demo of how to implement randomized question labels using [predefined random labels](reactivity.html#pre-defined-randomization). |
 | <i class="fa fa-chart-line" aria-hidden="true"></i> | reactive-plot | A demo of how to implement a reactive plot (a summary plot of all prior response data updated in real time). |
 | <i class="fa fa-up-right-from-square" aria-hidden="true"></i> | external-redirect | A demo of how to implement external redirection links in your survey. |
-| <i class="fa fa-map-location-dot" aria-hidden="true"></i> | leaflet-map | A demo of how to implement a leaflet map in your survey using the `custom` question type. |
+| <i class="fa fa-map-location-dot" aria-hidden="true"></i> | leaflet-map | A demo of how to implement a leaflet map in your survey using the [`sd_question_custom()`](custom-questions.html) function. |
+| <i class="fa fa-chart-line" aria-hidden="true"></i> | plotly | A demo of how to implement a plotly chart in your survey using the [`sd_question_custom()`](custom-questions.html) function. |
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