Specifically mention scrape_config section (#3556)
Specifically mention scrape_config section (#3556)

Signed-off-by: Kazuyoshi Kato <732288c132d39c7d9231a005036e5ecd0fff1d64@amazon.com>
open-telemetry/opentelemetry-collector,open-telemetry/opentelemetry-collector,open-telemetry/opentelemetry-collector-contrib,open-telemetry/opentelemetry-collector,open-telemetry/opentelemetry-collector-contrib