Update docker image workflow is failing

[kate-osborn]

As a maintainer of NGF
I want a workflow that automatically updates the nginx image within the NGF image
So that I do not need to update the nginx image manually.

Acceptance

• Any time there is a new build of an nginx image used in the last release, NGF is rebuilt with that new nginx build image.

The Update Docker Images workflow is failing: https://github.com/nginxinc/nginx-gateway-fabric/actions/runs/10051535172/job/27781275921