Add Anna Vovchenko to the speakers bureau

Why is this change being made?

This MR adds Anna Vovchenko to the speakers bureau as suggested on the Speaker process page. I am attending Vueday conference as a speaker on Friday, November 18th. Here is some info on my talk: https://2022.vueday.it/talks_speakers/#reusable-components

Author Checklist

• Provided a concise title for this Merge Request (MR)
• Added a description to this MR explaining the reasons for the proposed change, per say why, not just what
  • Copy/paste the Slack conversation to document it for later, or upload screenshots. Verify that no confidential data is added.
• Assign reviewers for this MR to the correct Directly Responsible Individual/s (DRI)
  • If the DRI for the page/s being updated isn’t immediately clear, then assign it to one of the people listed in the Maintained by section on the page being edited
  • 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

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