Resolve "i18n enable /pricing for continuous translation"

Build Variables:

• Use Contentful Preview API

Step 1: What is changing in this MR?

Production	Review app (EN)	Review app (DE)	Review app (FR)	Review app (JP)
https://about.gitlab.com/	https://3743-i18n-enable-pricing-for-continuous-translation.about.gitlab-review.app/pricing	https://3743-i18n-enable-pricing-for-continuous-translation.about.gitlab-review.app/de-de/pricing/	https://3743-i18n-enable-pricing-for-continuous-translation.about.gitlab-review.app/fr-fr/pricing/	https://3743-i18n-enable-pricing-for-continuous-translation.about.gitlab-review.app/ja-jp/pricing/

Closes #3743 (closed)