Update lychee to version 0.20.1

Copilot · trask · Copilot · commit 64567cb9124d · 2025-09-29T23:04:41.000Z
Co-authored-by: trask &lt;218610+trask@users.noreply.github.com&gt;
diff --git a/mise.toml b/mise.toml
@@ -1,5 +1,5 @@
 [tools]
-lychee = "0.18.1"
+lychee = "0.20.1"
 
 [tasks.link-check]
 run = 'lychee --verbose --config .github/config/lychee.toml .'
