MWPW-162313 Fix favicon on safari

[meganthecoder]

• Add favicon at the root to resolve 404 on safari

Full explanation in discussion: https://github.com/orgs/adobecom/discussions/3230

Resolves: MWPW-162313

Test URLs:

• Before: https://main--bacom--adobecom.hlx.live/?martech=off
• After: https://favicon-safari--bacom--meganthecoder.hlx.live/?martech=off

[aem-code-sync]

	Page	Scores	Audits	Google
📱	/?martech=off
🖥️	/?martech=off

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.70%. Comparing base (5cba023) to head (2aa537b).

Additional details and impacted files

@@           Coverage Diff           @@
##            stage     #267   +/-   ##
=======================================
  Coverage   96.70%   96.70%           
=======================================
  Files          12       12           
  Lines        1335     1335           
=======================================
  Hits         1291     1291           
  Misses         44       44           

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