Update dependency lychee to v0.20.0

[renovate]

This PR contains the following updates:

Package	Update	Change
lychee	minor	0.19.1 -> 0.20.0

---

Warning

Some dependencies could not be looked up. Check the Dependency Dashboard for more information.

---

Release Notes

lycheeverse/lychee (lychee)

v0.20.0

Compare Source

Added

• make wikilink extraction and checking opt-in (#​1803)
• skip fragment checking for unsupported MIME types (#​1744)
• add 'user-content-' prefix to support github markdown fragment (#​1750)

Fixed

• do not check the fragment when http response err but accepted (#​1763)
• treat a fragment in an empty directory as an error (#​1756)
• resolve index file inside a directory (#​1752)
• skip fragment check if website URL doesn't contain fragment (#​1733)

Other

• Bump dependencies (#​1811)
• Skip binary and invalid UTF-8 inputs (#​1810)
• Refactor input dumping and path retrieval with extension filtering (#​1648)
• Use a HashSet to store inputs and avoid duplicates (#​1781)
• add --index-files flag, and turn off index file checking by default (#​1777)
• Cleanup input example (#​1792)
• Fix missing identifier in snap build action; add snap install to readme (#​1793)
• refactor test_fragments to clarify expected successes/fails (#​1776)
• Regular expressions for exclude_path (#​1766)
• Replace unmaintained human-sort with numeric-sort (#​1759)
• Fix basic auth (#​1748)
• Update 'Users' section in the README
• Add ProseKit to users
• Migrate to Clippy 1.88 (#​1749)
• fix assertion in fragment checks
• Replace unreliable API URL
• display unsupported URLs (#​1727)

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.