this fixes the following issue
https://github.com/mermaid-js/mermaid/issues/1836
the sha256sum of mermaid.min.js downloaded from the following link as on
2021-01-26 09:36:19 UTC
https://unpkg.com/mermaid@8.9.0/dist/mermaid.min.js
is
910e77c953c7417fd61148fc61b175624001bdd3c6e977e228fcb30607f7bd42