Docs: Clarify ``sentry_on`` value is not quoted with example (#20639)
Docs: Clarify ``sentry_on`` value is not quoted with example (#20639)

Clarify the value for ``sentry_on`` is not quoted by providing an example.


apache/airflow,lyft/incubator-airflow,Acehaidrey/incubator-airflow,lyft/incubator-airflow,cfei18/incubator-airflow,nathanielvarona/airflow,apache/airflow,Acehaidrey/incubator-airflow,cfei18/incubator-airflow,nathanielvarona/airflow,Acehaidrey/incubator-airflow,Acehaidrey/incubator-airflow,bolkedebruin/airflow,Acehaidrey/incubator-airflow,apache/airflow,danielvdende/incubator-airflow,Acehaidrey/incubator-airflow,danielvdende/incubator-airflow,mistercrunch/airflow,nathanielvarona/airflow,nathanielvarona/airflow,mistercrunch/airflow,nathanielvarona/airflow,nathanielvarona/airflow,danielvdende/incubator-airflow,bolkedebruin/airflow,apache/airflow,danielvdende/incubator-airflow,cfei18/incubator-airflow,apache/airflow,cfei18/incubator-airflow,danielvdende/incubator-airflow,lyft/incubator-airflow,danielvdende/incubator-airflow,lyft/incubator-airflow,bolkedebruin/airflow,mistercrunch/airflow,bolkedebruin/airflow,bolkedebruin/airflow,cfei18/incubator-airflow,mistercrunch/airflow,cfei18/incubator-airflow,apache/airflow