Footer - Tertiary links missing a hover state

[ayeshtukova]

Tertiary links in the footer:
https://nswdesignsystem.surge.sh/patterns/footer/index.html

are missing hover state (must have for AA compliance).

@mason.phan

[mason.phan]

Thanks @ayeshtukova - duly logged https://github.com/digitalnsw/nsw-design-system/issues/35

[mason.phan]

Fixed in this commit https://github.com/digitalnsw/nsw-design-system/commit/d4423386f90364b1628506b037e4cfdd758c0b2b