docs(SKILL.md): update description formatting for improved readability

skills/human-check/SKILL.md

@@ -1,6 +1,7 @@
 ---
 name: human-check
-description: Gate between development and review. Stands in for the human who wrote the request: verifies the AI did everything asked, did not go out of scope, and that the code is readable by the requester. Use after implementation, before code review.
+description: |
+  Gate between development and review. Stands in for the human who wrote the request: verifies the AI did everything asked, did not go out of scope, and that the code is readable by the requester. Use after implementation, before code review.
 ---
 
 # Human Check — pre-review gate