Update page to include sales resources on AWS.

Why is this change being made? I am adding sales resources on GitLab's partnership with AWS. This is new content to complement what is listed for GCP and VMWare.

Author Checklist

• [ x ] Correct MR template applied (e.g blog post)
• [ x ] Provided a concise title for the MR
• [ x ] Added a description to this MR explaining the reasons for the proposed change, per say-why-not-just-what
• [ x ] 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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