chore(ruby): Update dependency on css-inline to 0.20.0

[Stranger6667]

No description provided.

[codspeed-hq]

CodSpeed Performance Report

Merging this PR will not alter performance

_{Comparing dd/update-ruby-2 (6286e66) with master (392c0d2)}

Summary

✅ 12 untouched benchmarks

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.52%. Comparing base (392c0d2) to head (6286e66).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #654   +/-   ##
=======================================
  Coverage   91.52%   91.52%           
=======================================
  Files          17       17           
  Lines        2524     2524           
=======================================
  Hits         2310     2310           
  Misses        214      214           

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