fix(review-blocks): annotate share() param to satisfy astro check

Task 11 reported `pnpm run verify` green, which was true, but the brief
asks for `pnpm run gate` -- and the gate also runs astro check, which
failed on ts(7006) implicit any.

src/components/blocks/VoteWidget.astro

@@ -33,7 +33,7 @@ interface Props {
 
 const { skillId, tally, youVote, unavailable = false } = Astro.props;
 const total = (tally.original || 0) + (tally.improved || 0);
-const share = (count) => (total ? Math.round((count / total) * 100) : 0);
+const share = (count: number) => (total ? Math.round((count / total) * 100) : 0);
 ---
 
 {