Allow markdown in attachment fields

packages/rocketchat-message-attachments/client/messageAttachment.html

@@ -86,7 +86,7 @@
 						{{#unless short}}
 							<div class="attachment-field">
 								<div class="attachment-field-title">{{title}}</div>
-								{{value}}
+								{{{RocketChatMarkdown value}}}
 							</div>
 						{{/unless}}
 					{{/each}}
@@ -94,7 +94,7 @@
 						{{#if short}}
 							<div class="attachment-field attachment-field-short">
 								<div class="attachment-field-title">{{title}}</div>
-								{{value}}
+								{{{RocketChatMarkdown value}}}
 							</div>
 						{{/if}}
 					{{/each}}