3.x / 4.x `gh-pages` deployment issues

[bspeare]

Problem

• Every time code is committed to 4.x, the latest branch is deployed to /latest
• Every time code is committed to the 3.x branch, the latest branch is deployed to /latest

When we tried to adjust 3.x from deploying to /latest last week, but important stylesheets were removed from the assets/css directory in the gh-pages branch: https://github.com/uiowa/uids/tree/372ea587c042beb9897566e4316ec9724cf9ee97

Temporary fixes

• We manually added the files back to assets/css.
• https://uids.brand.uiowa.edu/latest/ is now displaying 3.x.
• When the next commit into 4.x happens, /latest will switch back to the 4.x branch and after that when code is committed to 3.x, /latest will switch back to the 3.x branch without the assets/css files.

Proposed solution

Find a way to deploy 4.x to /latest without removing the css files in assets/css directory. Examine https://github.com/uiowa/uids/actions/

[e-marie-w]

Fixed via #848 and #850.