minor #14914 [CARE] Add Slack Link to Team Member (zanbaldwin)

This PR was merged into the 4.4 branch.

Discussion
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[CARE] Add Slack Link to Team Member

Wasn't paying attention to Slack this afternoon and missed my chance to review the original PR (#14911).

Commits
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f1c43df Add Slack Link to CARE Team Member

Author: wouterj

contributing/code_of_conduct/care_team.rst

@@ -35,6 +35,7 @@ of them at once by emailing **[email protected]**:
   * *E-mail*: hello [at] zanbaldwin.com
   * *Twitter*: `@ZanBaldwin <https://twitter.com/ZanBaldwin>`_
   * *SymfonyConnect*: `zanbaldwin <https://connect.symfony.com/profile/zanbaldwin>`_
+  * *SymfonySlack*: `@Zan <https://symfony-devs.slack.com/team/UBHGRU3NW>`_
 
 * **Valentine Boineau**