Update broken links in events.md

[fayexou]

1. In https://federalist-466b7d92-5da1-4208-974f-d61fd4348571.sites.pages.cloud.gov/preview/gsa/digitalgov.gov/fo-brokenlink-1/event/2022/09/15/uswds-monthly-call-september-2022/ the link for [https://benefits-tool-beta.usa.gov/death-of-a-loved-one/] is broken. The new link is [https://www.usa.gov/death-loved-one]
2. In https://federalist-466b7d92-5da1-4208-974f-d61fd4348571.sites.pages.cloud.gov/preview/gsa/digitalgov.gov/fo-brokenlink-1/event/2022/11/17/uswds-monthly-call-november-2022/ the link for [Federal Committee on Statistical Methodology, an interagency working group, has published some excellent research] is broken. The new link is [https://www.fcsm.gov/groups/sogisc/].
3. In https://federalist-466b7d92-5da1-4208-974f-d61fd4348571.sites.pages.cloud.gov/preview/gsa/digitalgov.gov/fo-brokenlink-1/event/2022/04/21/uswds-monthly-call-april-2022/ Corrected the link to [fai.gov]
4. In https://federalist-466b7d92-5da1-4208-974f-d61fd4348571.sites.pages.cloud.gov/preview/gsa/digitalgov.gov/fo-brokenlink-1/event/2021/12/16/uswds-monthly-call-december-2021/ fixed 13 hyperlink and text spacing issues.

Summary

Basic description of work done. Closes [#issue_no].

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Solution

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Dev Checklist

• [ ] PR has correct labels
• [ ] A11y testing (voice over testing, meets WCAG, run axe tools)
• [ ] Code is formatted properly

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