Deploy key linked to user

We have a deploy key used in our CI/CD pipelines, which was added by a user ‘ExColleagueJaneDoe’ who has since left the organization. The key is linked to a generic email address and not the user’s email address.
Each commit made by the deployment key seems to be OK and displays as ‘organizationname’, however when I look at the newsfeed in github.com the commit is shown as:

ExColleagueJaneDoe pushed to organizationname/organizationname-repo 20 minutes ago

Can this be fixed? I assume because ExColleagueJaneDoe initially added the deployment key that that’s why they’re linked to this deployment key in the activity feed?