fix: escape zero-width space character in CSS of Progress

[599316527]

Fix: #724

[codecov]

Codecov Report

Merging #725 into d20 will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##              d20     #725   +/-   ##
=======================================
  Coverage   75.92%   75.92%           
=======================================
  Files         179      179           
  Lines        6294     6294           
  Branches     1330     1330           
=======================================
  Hits         4779     4779           
  Misses       1048     1048           
  Partials      467      467           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update e0a5b0a...47acf36. Read the comment docs.