Bump ajv and @angular/cli

Bumps [ajv](https://github.com/ajv-validator/ajv) to 8.11.2 and updates ancestor dependency [@angular/cli](https://github.com/angular/angular-cli). These dependencies need to be updated together.


Updates `ajv` from 6.12.0 to 8.11.2
- [Release notes](https://github.com/ajv-validator/ajv/releases)
- [Commits](ajv-validator/ajv@v6.12.0...v8.11.2)

Updates `@angular/cli` from 9.1.5 to 9.1.15
- [Release notes](https://github.com/angular/angular-cli/releases)
- [Changelog](https://github.com/angular/angular-cli/blob/main/CHANGELOG.md)
- [Commits](angular/angular-cli@v9.1.5...v9.1.15)

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

Signed-off-by: dependabot[bot] <[email protected]>