fix: Make sure requests to jvndb timeout relatively fast

vulnerabilitylookup/feeders/jvndb.py

@@ -30,13 +30,13 @@ def _fetch_feeds(self) -> list[Path]:
         for year in range(2002, datetime.now().year + 1):
             to_fetch = base_url.format(year=year)
             with (self.files_storage / f'jvndb_{year}.rdf').open('w') as f:
-                response = requests.get(to_fetch)
+                response = requests.get(to_fetch, timeout=15)
                 f.write(response.text)
             all_files.append(self.files_storage / f'jvndb_{year}.rdf')
 
         # NOTE: this file must always be the last one in the list.
         with (self.files_storage / 'jvndb_updates.rdf').open('w') as f:
-            response = requests.get('https://jvndb.jvn.jp/en/rss/jvndb.rdf')
+            response = requests.get('https://jvndb.jvn.jp/en/rss/jvndb.rdf', timeout=15)
             f.write(response.text)
         all_files.append(self.files_storage / 'jvndb_updates.rdf')
         return all_files