hindawi: updates property key for volume year

Signed-off-by: pamfilos <[email protected]>

dags/hindawi/parser.py

@@ -216,7 +216,7 @@ def _get_publication_info(self, article):
                 "journal_volume": journal.find(
                     "./ns0:subfield/[@code='v']", self.prefixes
                 ).text,
-                "journal_year": journal.find(
+                "year": journal.find(
                     "./ns0:subfield/[@code='y']", self.prefixes
                 ).text,
             }