Fix styling value before rendering

[aymanbagabas]

Fixes: https://github.com/charmbracelet/log/issues/19

[codecov[bot]]

Codecov Report

Merging #30 (d58665b) into main (462efd0) will increase coverage by 3.55%. The diff coverage is 88.88%.

@@            Coverage Diff             @@
##             main      #30      +/-   ##
==========================================
+ Coverage   51.40%   54.95%   +3.55%     
==========================================
  Files          23       23              
  Lines         714      726      +12     
==========================================
+ Hits          367      399      +32     
+ Misses        331      313      -18     
+ Partials       16       14       -2     

Impacted Files	Coverage Δ
text.go	57.06% <88.88%> (+11.13%)	:arrow_up:
styles.go	42.85% <0.00%> (+42.85%)	:arrow_up:

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