Schedule automated monthly build/deploy

[maxpowis]

For now, the cv monthly build is not correctly implemented as it is only set up as a cron on the https://github.com/maxpowis/cv/blob/master/.github/workflows/deploy.yml action which is not rebuilding the pdf.

The cron needs to be put on the https://github.com/maxpowis/cv/blob/master/.github/workflows/release.yml github-action for the deploy to work.

Dependencies:

• Change versioning convention to calendar based #23 It would be worth looking into a change in version numbering convention so that it is more aligned to calendar versioning than semantic versioning standards.

[maxpowis]

depends on: #23