GB members on homepage to always link externally

This ensures the functinoality of the homepage remains consistent.

Signed off by: Matt Spencer <matt.spencer@arm.com>

content/_index.md

@@ -40,7 +40,7 @@ The Governing Body comprises a group of industry experts to ensure that market i
 
 ### Governing Body Members
 
-{{< imagegrid columns="3" data="members.governing_body" media_page="headless_media" >}}
+{{< imagegrid columns="3" data="members.governing_body" media_page="headless_media" directLink="true" >}}
 
 ### SOAFEE Steering Committees