We have a feed being generated on our WordPress site every day domain.com/?woocommerce_gpf=google but when doing a curl -I domain.com/?woocommerce_gpf=google the last modified date is a year old and doesn't update when feed get's updated. Any idea how to update the last modified tag for this? It's on a Ubuntu 18.04, Nginx and WordPress/Woocommerce platform.
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