Create 2023-04-07-march-2023.md

[arantxarecio]

Please review. Thank you.

PR Checklist

• [x] Test Cloud.gov Pages preview link for your branch for functionality - make sure all links and buttons work, javascript works as intended, and updates display as expected
• [ x] Conduct a HemingwayApp review of the content for plain language. Request plain language review in #helpwanted if needed before merging this PR
• [x ] Conduct a Lighthouse Audit via Chrome Developer Tools. Identify any issues that must be addressed before merging, and fix
• [ x] Ensure no non-public information is published in the commit messages

[dawnpm]

Preview: https://cg-a72b65a7-73f0-4859-a1d7-dc953cf6ade8.sites.pages.cloud.gov/preview/gsa/search-gov-website/arantxarecio-patch-1/about/updates/newsletters/march-2023.html