fix(Sofascore): update unique-tournaments url

The API url for fetching the list of tournaments changed from
"https://www.sofascore.com/api/v1/config/unique-tournaments/EN/football"
to "https://www.sofascore.com/api/v1/config/default-unique-tournaments/EN/football"

Author: probberechts

soccerdata/sofascore.py

@@ -77,7 +77,7 @@ def read_leagues(self) -> pd.DataFrame:
         -------
         pd.DataFrame
         """
-        url = SOFASCORE_API + "config/unique-tournaments/EN/football"
+        url = SOFASCORE_API + "config/default-unique-tournaments/EN/football"
         filepath = self.data_dir / "leagues.json"
         reader = self.get(url, filepath)
         data = json.load(reader)