Bump ajv from 8.17.1 to 8.18.0 (#2029)

Bumps [ajv](https://github.com/ajv-validator/ajv) from 8.17.1 to 8.18.0.
- [Release notes](https://github.com/ajv-validator/ajv/releases)
- [Commits](ajv-validator/ajv@v8.17.1...v8.18.0)

---
updated-dependencies:
- dependency-name: ajv
  dependency-version: 8.18.0
  dependency-type: direct:production
  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

@@ -33,7 +33,7 @@
   "main": "index.js",
   "bin": "./reffy.js",
   "dependencies": {
-    "ajv": "8.17.1",
+    "ajv": "8.18.0",
     "ajv-formats": "3.0.1",
     "commander": "14.0.2",
     "fetch-filecache-for-crawling": "5.1.1",