Our two style-guide pages could refer to each other

[MarciaRieferJohnston]

Could be helpful to have the WTD style guide (www/docs/style-guide.rst) point to the WTD page on style guides (www/docs/guide/writing/style-guides.md) and vice versa.

[lennessyy]

@rosewms This some seems to be pretty simple - I can quickly knock this one out