Update app.html.heex

[solar05]

Fixes #ISSUE_ID

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 59.71%. Comparing base (942c180) to head (98b6b78).
Report is 6 commits behind head on master.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2111      +/-   ##
==========================================
+ Coverage   59.52%   59.71%   +0.18%     
==========================================
  Files         253      253              
  Lines        5275     5280       +5     
==========================================
+ Hits         3140     3153      +13     
+ Misses       2135     2127       -8     

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