fix contact link

Dependencies

• [2] E5FYDACS a likely source of issues
• [3] D4FEFHQC flesh out Readme
• [*] FS2ITYYH record a known issue

Change contents

• replacement in README.md at line 64
  [2.170]→[2.170:219](∅→∅)
  − found anything amiss: http://akkartik.name/about
  [2.170]

  [3.1117]
  + found anything amiss: http://akkartik.name/contact