Increase the default timeout value

Recently links to web.archive.org were added for various products. Such links are very long to load. This increases the default timeout value so that such links do not make the update fail.

src/common/endoflife.py

@@ -31,7 +31,8 @@ def list_products(method, products_filter=None, pathname="website/products"):
     return products_with_method
 
 
-def fetch_url(url, retry_count=5, timeout=10, data=None, headers=None, encoding='utf-8'):
+# Keep the default timeout high enough to avoid errors with web.archive.org.
+def fetch_url(url, retry_count=5, timeout=30, data=None, headers=None, encoding='utf-8'):
     last_exception = None
 
     headers = {'User-Agent': USER_AGENT} | {} if headers is None else headers