Update deps: es5-ext and sanitize-html

[travjenkins]

Changes

• Combined the two PRs for dependabot
  • https://github.com/estuary/marketing-site/pull/207
  • https://github.com/estuary/marketing-site/pull/210

Tests / Screenshots

• cleared out the node_modules folder and ran a fresh install
• hit the application

[flavioriper]

LGTM, dependencies and project running well here

[github-actions[bot]]

Visit the preview URL for this PR (updated for commit 0b52090):

https://estuary-marketing--pr222-deps-sanitize-html-a-6mozmkrs.web.app

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