[ie/sproutvideo] Fix extractor (#13610)

Closes #13606
Authored by: bashonly

yt_dlp/extractor/sproutvideo.py

@@ -101,7 +101,7 @@ class SproutVideoIE(InfoExtractor):
         webpage = self._download_webpage(
             url, video_id, headers=traverse_obj(smuggled_data, {'Referer': 'referer'}), impersonate=True)
         data = self._search_json(
-            r'var\s+(?:dat|playerInfo)\s*=\s*["\']', webpage, 'player info', video_id,
+            r'(?:var|const|let)\s+(?:dat|playerInfo)\s*=\s*["\']', webpage, 'player info', video_id,
             contains_pattern=r'[A-Za-z0-9+/=]+', end_pattern=r'["\'];',
             transform_source=lambda x: base64.b64decode(x).decode())