chore(deps): update dependency lychee to v0.21.0 (open-telemetry#7789)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

mise.toml

@@ -1,5 +1,5 @@
 [tools]
-lychee = "0.20.1"
+lychee = "0.21.0"
 
 [settings]
 # Only install tools explicitly defined in the [tools] section above