Bump ajv from 8.18.0 to 8.20.0

Bumps [ajv](https://github.com/ajv-validator/ajv) from 8.18.0 to 8.20.0.
- [Release notes](https://github.com/ajv-validator/ajv/releases)
- [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
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package.json

@@ -85,7 +85,7 @@
     "@eslint/js": "10.0.1",
     "@stylistic/eslint-plugin": "5.10.0",
     "@types/markdown-it": "14.1.2",
-    "ajv": "8.18.0",
+    "ajv": "8.20.0",
     "ava": "7.0.0",
     "c8": "11.0.0",
     "character-entities": "2.0.2",