Add an or statement to yml to build docs before deploy

I'm new to messing with .ymls, and an unintended consequence of the changes I made in the last MR !85 (merged) is that the documentation files are not built when commits are made to main (only merge requests to main), which means the deployment step of the pipeline has no files to deploy, and it fails. This MR attempts to resolve that issue by adding an "or" statement to the gitlab-ci.yml file. Please take a look and let me know if you see any other issues with this implementation. I reached out to CDI-Software/General for some tips. Thanks!