First click the "See how NAML generates this page" link towards the bottom right of your forum. Then click the "cog wheel" button and select "Search Macros". Insert the text to search for into the box, maiking sure the option "Macro source contains" is selected. In your case you'll find there's only one result found.
Of course, editing macros is a bit technical, but it will be the only way to make the change you want. You'll find it easy enough if you're half familiar with HTML or any modern programming language. (I tend to fall down with the "Modern programming language" bit, so don't expect me to be the fount of all wisdom on NAML!)
Volunteer Helper - but recommending that users move off the platform!
Once the admin for GregHelp now deleted.