Update mkdocs to render tables with multi line cells properly

[aruneshpa]

What steps did you take and what happened?

The current project docs do not render tables with multi line cells. Any new line character is treated as a new row. For example, looking at this VirtualMachineClassSpec, we can see that the spec has been broken down in three rows instead of one column.

What did you expect to happen?

Multi line table cell contents should be rendered properly.

Is there anything else you would like to add?

Looks like this is a known issue: mkdocs/mkdocs#1384

The proposed solution is to use markdown extension: https://gitlab.com/WillDaSilva/markdown_grid_tables.