batches: remove redundant button
Created by: courier-new
When looking at the code host credentials modal, I noticed we had a sort of redundant set of two buttons on the step of the modal where the SSH key is presented. This just de-dupes the button and gives it a more appropriate title.
Test plan
This is primarily a visual change, since the onClick behavior is left alone. This modal is covered by Storybook stories.
App preview:
Check out the client app preview documentation to learn more.