Add Developer Evangelists LinkedIn to the team page

Michael Friedrichrequested to merge
team-de-linkedin into master

Why is this change being made?

Today I scrolled over the team page and recognized the LinkedIn icon. I've modified the team members from Developer Evangelism and added the short profile from LinkedIn. @brendan already added theirs.

Author Checklist

  • Provided a concise title for the MR
  • Added a description to this MR explaining the reasons for the proposed change, per say-why-not-just-what
  • Assign this change to the correct DRI
    • If the DRI for the page/s being updated isn’t immediately clear, then assign it to your manager.
    • If your manager does not have merge rights, please ask someone to merge it AFTER it has been approved by your manager in #mr-buddies.
    • If the changes relate to any part of the project other than updates to content and/or data files please make sure to ping @gl-static-site-editor in a comment for a review and merge. For example changes to .gitlab-ci.yml, JavaScript/CSS/Ruby code or the layout files.

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