Bump ajv from 8.18.0 to 8.20.0 (mdn#43945)

Bumps [ajv](https://github.com/ajv-validator/ajv) from 8.18.0 to 8.20.0.
- [Commits](ajv-validator/ajv@v8.18.0...v8.20.0)

---
updated-dependencies:
- dependency-name: ajv
  dependency-version: 8.20.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package-lock.json

@@ -52,7 +52,7 @@
     "@apideck/better-ajv-errors": "^0.3.7",
     "@mdn/fred": "2.4.3",
     "@octokit/rest": "^22.0.1",
-    "ajv": "^8.18.0",
+    "ajv": "^8.20.0",
     "ajv-formats": "^3.0.1",
     "async": "^3.2.6",
     "cheerio": "1.2.0",