docs: update gateway EOL (#3257)

Updates gateway 0.x EOL

Author: Meschreiber

docs/source/schema-design/federated-schemas/reference/backward-compatibility.mdx

@@ -6,7 +6,7 @@ description: Frequently asked questions when transitioning from Apollo Federatio
 
 ## Is official support ending for `@apollo/gateway` v0.x?
 
-Yes. As of 15 November 2022, `@apollo/gateway` v0.x is officially deprecated, with end-of-life scheduled for 22 September 2023. `@apollo/gateway` v2.x remains fully supported.
+Yes. `@apollo/gateway` v0.x was officially deprecated as of 15 November 2022 and reached end-of-life on 22 September 2023. `@apollo/gateway` v2.x remains fully supported.
 
 [Learn more about deprecation and end-of-life.](https://www.apollographql.com/docs/resources/product-launch-stages#stages-for-discontinuing-support)