Fix: update typo on Footer.Link from Gihub to Github

[Baxi19]

There is a typo in the Flowbite React documentation:
Gihub appears but it should be Github

[codecov]

Codecov Report

Merging #210 (0d4f8e5) into main (9cd1eab) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #210   +/-   ##
=======================================
  Coverage   98.92%   98.92%           
=======================================
  Files         127      127           
  Lines        7277     7277           
  Branches      826      826           
=======================================
  Hits         7199     7199           
  Misses         78       78           

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[rluders]

Thank you @Baxi19