fix(performance): set minimal cpu for `export` service (#1427) #471

Job	Run time
Deploy on Kubernetes 🐳 / 🐳 Deploy PreProd on Kubernetes	29m 33s
Deploy on Kubernetes 🐳 / 🕵️ Trivy vulnerability scanner (harbor.fabrique.social.gouv.fr/cdtn/cdtn-admin/export:preprod-b2...	44s
Deploy on Kubernetes 🐳 / 🕵️ Trivy vulnerability scanner (harbor.fabrique.social.gouv.fr/cdtn/cdtn-admin/frontend:preprod-...	46s
Deploy on Kubernetes 🐳 / 🕵️ Trivy vulnerability scanner (harbor.fabrique.social.gouv.fr/cdtn/cdtn-admin/hasura:preprod-b2...	35s
	31m 38s

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