fix: hotfix typo in release.yml

[Yohe-Am]

Yes, another one lol. This removes the target param from the release builder which will default to the last stage of the Dockerfile, the epoint stage. I elected to remove the parameter rather than replacing the value in order to remove one more place future changes will have to consider. (convention better than configuration the saying goes (i think)).

Motivation and context

The typegate images currently have the wrong target and thus the wrong entrypoint command.

Migration notes

No changes required

Checklist

• The change come with new or modified tests
• Hard-to-understand functions have explanatory comments
• End-user documentation is updated to reflect the change