fix early adopter redirect (getsentry#7515)

Author: shanamatthews

src/docs/product/accounts/early-adopter-features/index.mdx

@@ -1,7 +1,8 @@
 ---
 title: "Early Adopter Features"
 sidebar_order: 60
-redirect from: /product/accounts/early-adopter/
+redirect_from:
+  - /product/accounts/early-adopter/
 description: "Learn which features are currently in the early adopter phase."
 ---