Fix typo in changelog for 1.3.0 (#1586)
Fix typo in changelog for 1.3.0 (#1586)

The last release was in December 2019.
1.3.0 was released in January 2020, not 2019.
grafana/loki,grafana/loki,grafana/loki,grafana/loki,grafana/loki,grafana/loki