fix(build): Use escaped dbl quotes to support building on Windows

[mister-ben]

Description

Using single quotes in the sass command doesn't work with Windows, causing sass to fail to locate imports.
Fixes #8149

Specific Changes proposed

Uses \" rather than ' within script strings in package.json.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.85%. Comparing base (af06f50) to head (750dfaf).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #8681   +/-   ##
=======================================
  Coverage   82.85%   82.85%           
=======================================
  Files         113      113           
  Lines        7647     7647           
  Branches     1839     1839           
=======================================
  Hits         6336     6336           
  Misses       1311     1311           

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