Fix lychee 0.24 config syntax

Author: breedx-splk

.github/config/lychee.toml

@@ -6,8 +6,8 @@ retry_wait_time = 5
 max_retries = 6
 max_concurrency = 4
 
-# Check link anchors
-include_fragments = true
+# Check link anchors. Lychee 0.24+ expects a mode string here.
+include_fragments = "full"
 
 exclude = [
   "^https://github.com/.*#discussion_r.*$",