docs: add public_bet_pct field to odds response reference

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: Mlaz-code

content/api-reference/odds.mdx

@@ -236,6 +236,7 @@ X-Request-Id: req_abc123def456
 | `is_live` | boolean | Whether the event is currently live |
 | `player_name` | string\|undefined | Player name (player prop markets only) |
 | `stat_category` | string\|undefined | Stat category, e.g. `points`, `rebounds` (player prop markets only) |
+| `public_bet_pct` | number\|undefined | Public betting ticket percentage (0.0-1.0). Currently BetMGM only. |
 
 <Callout type="info">
 Live game state (scores, periods, clocks) is available via the [Game State](/api-reference/gamestate) endpoint.