Fix per suggestion

Co-authored-by: bashonly <88596187+bashonly@users.noreply.github.com>

yt_dlp/extractor/bilibili.py

@@ -666,9 +666,8 @@ class BiliBiliIE(BilibiliBaseIE):
 
         initial_state = self._search_json(r'window\.__INITIAL_STATE__\s*=', webpage, 'initial state', video_id, default=None)
         if not initial_state:
-            if traverse_obj(self._search_json(
-                    r'<script\s*>\s*window\._riskdata_\s*=', webpage, 'risk data', video_id, default=None), 'v_voucher'):
-                raise ExtractorError('You are downloading too frequently, please wait and try later', expected=True)
+            if self._search_json(r'\bwindow\._riskdata_\s*=', webpage, 'risk', video_id, default={}).get('v_voucher'):
+                raise ExtractorError('You have exceeded the rate limit. Try again later', expected=True)
             query = {'platform': 'web'}
             prefix = prefix.upper()
             if prefix == 'BV':