Bump ajv, @angular/cli and har-validator

Bumps [ajv](https://github.com/ajv-validator/ajv) to 8.11.0 and updates ancestor dependencies [ajv](https://github.com/ajv-validator/ajv), [@angular/cli](https://github.com/angular/angular-cli) and [har-validator](https://github.com/ahmadnassri/node-har-validator). These dependencies need to be updated together.


Updates `ajv` from 5.5.2 to 8.11.0
- [Release notes](https://github.com/ajv-validator/ajv/releases)
- [Commits](ajv-validator/ajv@v5.5.2...v8.11.0)

Updates `@angular/cli` from 6.2.4 to 15.0.2
- [Release notes](https://github.com/angular/angular-cli/releases)
- [Changelog](https://github.com/angular/angular-cli/blob/main/CHANGELOG.md)
- [Commits](angular/angular-cli@v6.2.4...15.0.2)

Updates `har-validator` from 5.1.0 to 5.1.5
- [Release notes](https://github.com/ahmadnassri/node-har-validator/releases)
- [Changelog](https://github.com/ahmadnassri/node-har-validator/blob/master/.releaserc)
- [Commits](ahmadnassri/node-har-validator@v5.1.0...v5.1.5)

---
updated-dependencies:
- dependency-name: ajv
  dependency-type: indirect
- dependency-name: "@angular/cli"
  dependency-type: direct:development
- dependency-name: har-validator
  dependency-type: indirect
...

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