Update OG images

Created by: elzannewentzel

The OG image for some of the pages on about is out of date.

Update all OG images to this image: https://drive.google.com/drive/folders/1F8vysS2YYc_0GElR1FgKX5USb4_FNoaK

• It looks like https://about.sourcegraph.com/meta/sourcegraph-social-image-share-02.png is the correct image we use on the homepage layout

Pages and current OG images can be found here.

This can potentially provide an opportunity for #dogfooding - can we use search to identify where we need to update an image or can we use Batch changes to do the change?

Asana: https://app.asana.com/0/1200095757619647/1202262992122057/f