Switch link checker to lychee (and let it run more often) #532
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
The current action https://github.com/gaurav-nelson/github-action-markdown-link-check/ is not maintained any more.
We switch to https://github.com/lycheeverse/lychee, which is also used in the main repository. Refs #526 (comment).
This also enables link checking on push and on a regular basis. Due to a limiation of the GitHub workflow syntax, the checks are done both on push and on PR creation, meaning they run twice.