Update fonts (fixes #411)

[JackMorganNZ]

Changes:

• Body font from 'Open Sans' to 'Noto Sans'
• Heading font 'Patrick Hand' to 'Sniglet'

When new languages are being added, new fonts for these languages should be looked into to provide consistency of design across languages.

Fixes #411.

[codecov]

Codecov Report

Merging #746 into develop will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           develop    #746   +/-   ##
=======================================
  Coverage     99.4%   99.4%           
=======================================
  Files           93      93           
  Lines         3047    3047           
  Branches       373     373           
=======================================
  Hits          3029    3029           
  Misses           8       8           
  Partials        10      10

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