[#183] Inconsistency between GitHub file preview and GitHub Page

[Eclipse-Dominator]

Fixes #183

The use of differing markdown renderer in Github pages causes certain tables that can be displayed properly in Github to appear jumbled in Github pages.

To ensure consistent rendering between GitHub markdown and the markdown in Gtihub pages, Let's replace the kramdown markdown renderer with GFM in _config.yml.

[canihasreview[bot]]

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[codecov[bot]]

Codecov Report

Merging #184 (679f7fd) into master (481a3d9) will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #184   +/-   ##
=========================================
  Coverage     72.06%   72.06%           
  Complexity      399      399           
=========================================
  Files            70       70           
  Lines          1235     1235           
  Branches        127      127           
=========================================
  Hits            890      890           
  Misses          314      314           
  Partials         31       31           

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[Eclipse-Dominator]

See compatibility issue