fix(skills): clarify grill loop sections

src/skills/grill/SKILL.md

@@ -36,14 +36,14 @@ A completed grill summary is not an instruction to build.
    Finish when the interview has started with exactly one numbered question.
 
 4. Run the question loop.
-   Show the full open-question list on every active grill turn.
+   Show the Open questions and Blocked questions sections on every active grill turn.
    Ask one numbered question at a time.
    Apply [Question format](#question-format) to each question.
    Wait for the user's answer.
    Apply [Open-question accounting](#open-question-accounting) before asking again.
    Resolve newly answerable facts yourself before asking again.
 
-   Finish when one answer has been accounted for.
+   Finish when the answer is accounted for and the next turn ending is ready.
 
 5. Close the interview.
    Stop when the open-question list is empty.