Ignore actions-user bot contributions

[pifou25]

Hello

chadburn/docs-svelte/scripts/fetch-contributors.js

Line 49 in ac32851

// Filter out bots or other non-user accounts if needed

It does not work as expected, the actions-user act as a bot but is not detected as such. So, he commit every week and the script detect this commit as a new contribution and add it, and it continue, again and again...

https://github.com/PremoWeb/chadburn/commits?author=actions-user