Updated Detecting changes in images (markdown)

Detecting-changes-in-images.md

@@ -21,7 +21,7 @@ And then in the **Visual Selector** you chose the "wrapper" element
 
 ### How to detect when the image changes?
 
-Use the `**source:**` luke..
+Use the **`source:`** luke..
 
 By adding "`source:`" to the start of your URL -  `source:https://the-site-you-are-watching.com` and set a CSS/xPath filter (created in the **Visual Selector** tool), you will get a notification when the website changes "`november-calendar.jpg`" to "`december-calendar.jpg`"