add html-keyboard-response-raf to readme table

README.md

@@ -26,6 +26,7 @@ Plugin/Extension | Contributor | Description
 [countdown](https://github.com/jspsych/jspsych-contrib/blob/main/packages/extension-countdown/README.md) | [Shaobin Jiang](https://github.com/Shaobin-Jiang) | This extension adds a countdown during a trial.
 [gamepad](https://github.com/jspsych/jspsych-contrib/blob/main/packages/plugin-gamepad/README.md) | [Shaobin Jiang](https://github.com/Shaobin-Jiang) | This plugin allows one to use gamepads in a jsPsych experiment.
 [html-choice](https://github.com/jspsych/jspsych-contrib/blob/main/packages/plugin-html-choice/README.md) | [Younes Strittmatter](https://github.com/younesStrittmatter) | This plugin displays clickable html elements that can be used to present a choice.
+[html-keyboard-response-raf](https://github.com/jspsych/jspsych-contrib/blob/main/packages/plugin-html-keyboard-response-raf/README.md) | [Josh de Leeuw](https://github.com/jodeleeuw) | This plugin displays an arbitrary HTML string and collects responses using the keyboard. It uses requestAnimationFrame for timing.
 [html-multi-response](https://github.com/jspsych/jspsych-contrib/blob/main/packages/plugin-html-multi-response/README.md) | [Adam Richie-Halford](https://github.com/richford) | This plugin collects responses to an arbitrary HTML string using both button clicks and key presses.
 [html-swipe-response](https://github.com/jspsych/jspsych-contrib/blob/main/packages/plugin-html-swipe-response/README.md) | [Adam Richie-Halford](https://github.com/richford) | This plugin collects responses to an arbitrary HTML string using swipe gestures and keyboard responses.
 [html-vas-response](https://github.com/jspsych/jspsych-contrib/blob/main/packages/plugin-html-vas-response/README.md) | [Isaac Kinley](https://github.com/kinleyid) | This plugin collects responses to an arbitrary HTML string using a point-and-click visual analogue scale.