Improvement to /cody page

[fabicastp]

Follow up issue to https://github.com/sourcegraph/about/issues/6389

• [ ] Could we have them try to increase the size of the hover shine effect? Basically, the dimensions of the effect need to be increased like 300% and we need to add a filter: blur (180px) to soften it out as well.

[gitstart-app[bot]]

Here is the GitStart Ticket for this issue: https://clients.gitstart.com/sourcegraph/3436/tickets/SGM-6394