[doc] refactor: (PartnersBanner) use NuxtImg component and update UI

[vuejs-jp-bot]

本家のドキュメントに更新がありました 📄
Original: nuxt@8afd236
updatedFiles:
content/en/partners/0.netlify.md
content/en/partners/1.vercel.md
content/en/partners/2.layer-0.md
content/en/partners/3.storyblok.md
content/en/partners/4.swell.md
content/en/partners/5.ship-shape.md
content/en/partners/6.64robots.md
content/en/partners/7.vue-storefront.md