[Task]: Read documentation on upgrading Airflow to Apache 3.0

[LucaCinquini]

[LucaCinquini]

See official upgrade documentation: https://airflow.apache.org/docs/apache-airflow/stable/installation/upgrading_to_airflow3.html

But unfortunately it looks like there isn't yet a Helm chart that supports it? See https://airflow.apache.org/docs/helm-chart/stable/index.html