Run once every month to make sure urls are still good

[michaelachrisco]

Is your feature request related to a problem? Please describe. At the moment, this repo sits without real updated in a while. It would-be nice if it triggered itself and sent me an email if one of the links goes down to fix. Once a month should be ok.

Describe the solution you'd like We can use:

on:
  schedule:
    - cron: '0 0 1 * *'

to run this once every month

[michaelachrisco]

https://medium.com/tradeling/how-to-schedule-jobs-using-github-actions-9f32667706ea