Bump active_model_serializers from 0.10.7 to 0.10.8 (#9209)
Bump active_model_serializers from 0.10.7 to 0.10.8 (#9209)

Bumps [active_model_serializers](https://github.com/rails-api/active_model_serializers) from 0.10.7 to 0.10.8.
- [Release notes](https://github.com/rails-api/active_model_serializers/releases)
- [Changelog](https://github.com/rails-api/active_model_serializers/blob/master/CHANGELOG-0-10.md)
- [Commits](https://github.com/rails-api/active_model_serializers/compare/v0.10.7...v0.10.8)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
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