Disable the Grammarly chrome extension on Cactus

This was causing issues with rendering due to the way the extension was injecting itself into our HTML.

https://stackoverflow.com/questions/37444906/how-to-stop-extensions-add-ons-like-grammarly-on-contenteditable-editors

web/src/scripts/components/PromptContentCard.vue

@@ -164,6 +164,7 @@
                     <textarea ref="reflectionInput"
                             type="text"
                             rows="1"
+                            data-gramm="false"
                             v-model="response.content.text"
                             v-on:click.stop
                             :class="{hasValue: !!response.content.text}"