message: docs: add Sam Julien to `Collaborator` group
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diff: "twitter": "samjulien",
  "website": "http://www.samjulien.com/",
  "bio": "Sam Julien builds software, articles, video courses, and campfires. A developer, speaker, writer, and GDE in the Pacific Northwest, Sam's favorite thing in the world is changing someone's life by teaching them to code.",
  - "group": "GDE"
  + "group": "Collaborator",
  + "mentor": "gkalpak"
  },
  "JiaLiPassion": {
  "name": "JiaLi Passion",
  