Add multiples repository in gitsync helm charts

### Description Hello ! Can you add the feature to add multiples repository for gitsync in the helm chart ### Use case/motivation Because I got multiples repository for my dags... I use bitnami helm chart but she is not optimal for us. ### Related issues _No response_ ### Are you willing to submit a PR? - [ ] Yes I am willing to submit a PR! ### Code of Conduct - [X] I agree to follow this project's [Code of Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)