Update index.html.md added suggestion to copy product leadership comments into...

Why is this change being made?

For 13.0 launch, the message lead copied all feedback from product leadership and CEO and consolidated it into one comment on the MR with check boxes. This made it easier to keep track of the status of those suggestions. It's also more aligned to GitLab's practice of MR before slack. It would be even better if we could get the leadership team to comment on the MR instead of in slack.

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.

For help with failing pipelines reach out in #mr-buddies in Slack