SAR announcements lack "og:image" in the HTML header

It appears that web pages with SAR announcements often lack the 'og:image' property in the header, making them less shareable on social media. See e.g. this announcement:

https://www.researchcatalogue.net/portal/announcement?announcement=3841488

That can be debugged here:

https://developers.facebook.com/tools/debug/

If these posts by default have an image, this should be easy to fix.