Create gh actions to automatically generate .pdf from .md

[martin-mat]

For .pdf files generated from .md, create GH actions to generate them automatically on changes of source .md files.

[Smitholi67]

A manual example of this being done today would be:

Markdown file (https://github.com/lfn-cnti/certification/blob/main/Certified_CNTi_Terms.md) is also saved as a PDF for convenience when vendors are going to sign the form and return it to CNTi. The PDF is manually created (https://github.com/lfn-cnti/certification/blob/main/Certified_CNTi_Terms.pdf).

Note that today there is probably a middle step to format the MD file before exporting to PDF. The exact steps for this are unknown BUT the purpose for this is only to create a PDF file that "looks nice" and avoids having any MD specific formatting.