Fix typo in 3.0 launch blog (#1214)

Author: augustjk

packages/lit-dev-content/site/blog/2023-10-10-lit-3.0.md

@@ -243,7 +243,7 @@ We are happy for it to officially graduate and encourage everyone to use it! For
 
 ### Context
 
-`@lit/context` is an interoperable system for an element to request data from any of its ancestors. It's useful for shared elements to receive configuration from their environemnt, for elements in a composable plugin system to exhange data, and as an interoperable DOM-based dependency injection system.
+`@lit/context` is an interoperable system for an element to request data from any of its ancestors. It's useful for shared elements to receive configuration from their environment, for elements in a composable plugin system to exhange data, and as an interoperable DOM-based dependency injection system.
 
 Start by creating a context using the `createContext()` function. A context acts as a key, for the consumer and provider of the data to identify each other.