Fix visual bug where navigation menu flashes on desktop until Alpine is loaded

[caendesilva]

Adds the x-uncloak-md class to the navigation menu, preventing it from being cloaked by Alpine.

[codecov]

Codecov Report

Merging #278 (2f3e7e6) into master (a704223) will not change coverage.
The diff coverage is n/a.

@@             Coverage Diff             @@
##              master      #278   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
  Complexity       814       814           
===========================================
  Files            100       100           
  Lines           2043      2043           
===========================================
  Hits            2043      2043           

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