Kibana version: 7.6.2
Original install method (e.g. download page, yum, from source, etc.): stack Docker image
Describe the bug:
Dashboards with text in some Asian languages will be unavailable in Reporting, if the OS does not have the necessary language fonts provided.

Steps to reproduce:

1. Set up Kibana with the stack docker image: docker.elastic.co/kibana/kibana:7.6.2
2. Create a Markdown visualization
3. Paste the text from selecting a language in Wikipedia into the Markdown.

Save the visualization and create a PNG report.

Expected behavior:
The visualization should look the same way it does in the user's browser. Instead, a few Asian language text is unavailable.

Screenshots (if relevant):
Kibana UI:

The generated report:

Errors in browser console (if relevant):

Provide logs and/or server output (if relevant):

Any additional context: