chore(deps): update dependency lychee to v0.21.0

[renovate]

This PR contains the following updates:

Package	Update	Change
lychee	minor	0.20.1 -> 0.21.0

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Release Notes

lycheeverse/lychee (lychee)

v0.21.0

Compare Source

Added

• print warning if input source matches no files (#​1865)
• (base-url) [breaking] disallow relative local base to avoid confusion (#​1857)
• improve InvalidIndexFile error to mention index file names (#​1859)

Fixed

• move log level padding outside brackets (#​1871)
• do not reuse excluded status from cache (#​1850)
• fields missing from config.toml parsing logic (#​1843)

Other

• Bump the dependencies group across 1 directory with 15 updates (#​1874)
• Inline formatting arguments for anyhow macros as per new lint
• Man pages (#​1858)
• Add --default-extension argument to force file format (#​1842)
• Hard wrap help text for options (#​1854)
• Bump the dependencies group with 6 updates (#​1855)
• Add exhaustivity check for fold_in! macro (#​1848)
• Additional redirect reporting (#​1853)
• Redirect reporting (#​1725)
• Add WinGet installation instructions (#​1849)
• [breaking] Use ResolvedInputSource downstream of InputContent (#​1840)
• Bump the dependencies group with 5 updates (#​1845)
• Implement --files-from Option (#​1836)
• Apply fallback extensions if directory links resolve to a dir (#​1826)
• Clarify --base-url and --root-dir and their interactions (#​1787)
• Add test for making sure URL inputs always get checked (#​1824)
• Add conda install to readme (#​1822)
• Bump the dependencies group with 3 updates (#​1821)
• Refactor error reporting (#​1731)

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