Bump ajv

Bumps [ajv](https://github.com/ajv-validator/ajv) to 8.18.0 and updates ancestor dependency . These dependencies need to be updated together.


Updates `ajv` from 8.1.0 to 8.18.0
- [Release notes](https://github.com/ajv-validator/ajv/releases)
- [Commits](ajv-validator/ajv@v8.1.0...v8.18.0)

Updates `ajv` from 6.12.6 to 6.14.0
- [Release notes](https://github.com/ajv-validator/ajv/releases)
- [Commits](ajv-validator/ajv@v8.1.0...v8.18.0)

---
updated-dependencies:
- dependency-name: ajv
  dependency-version: 8.18.0
  dependency-type: direct:production
- dependency-name: ajv
  dependency-version: 6.14.0
  dependency-type: indirect
...

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

Author: dependabot[bot]