fix: updated links

Author: florianv

src/Service/CurrencyConverter.php

@@ -33,13 +33,13 @@ final class CurrencyConverter extends HttpService
 {
     use SupportsHistoricalQueries;
 
-    const FREE_LATEST_URL = 'https://free.currencyconverterapi.com/api/v6/convert?q=%s&apiKey=%s';
+    const FREE_LATEST_URL = 'https://free.currconv.com/api/v7/convert?q=%s&apiKey=%s';
 
-    const ENTERPRISE_LATEST_URL = 'https://api.currencyconverterapi.com/api/v6/convert?q=%s&apiKey=%s';
+    const ENTERPRISE_LATEST_URL = 'https://api.currconv.com/api/v7/convert?q=%s&apiKey=%s';
 
-    const FREE_HISTORICAL_URL = 'https://free.currencyconverterapi.com/api/v6/convert?q=%s&date=%s&apiKey=%s';
+    const FREE_HISTORICAL_URL = 'https://free.currconv.com/api/v7/convert?q=%s&date=%s&apiKey=%s';
 
-    const ENTERPRISE_HISTORICAL_URL = 'https://api.currencyconverterapi.com/api/v6/convert?q=%s&date=%s&apiKey=%s';
+    const ENTERPRISE_HISTORICAL_URL = 'https://api.currconv.com/api/v7/convert?q=%s&date=%s&apiKey=%s';
 
     /**
      * {@inheritdoc}