Situation reports: annotation and hatched area are not rendered

[leandrocollares]

Average daily prevalence globally chart's annotation and hatched area are not rendered.

Please compare http://localhost:8080/situation-reports?xmin=2022-10-04&xmax=2023-04-04&loc&pango=BQ.1.1&selected and https://outbreak.info/situation-reports?xmin=2022-10-04&xmax=2023-04-04&loc&pango=BQ.1.1&selected

This issue may be related to #653.