Fixed spelling + capitalize JavaScript

README.md

@@ -18,11 +18,11 @@ For more details, take a look at the code! It is well-commented.
 
 ## Updates
 
-This example was original written using the [WebSocket API](https://developers.cloudflare.com/workers/runtime-apis/websockets/), but has since been [modified](https://github.com/cloudflare/workers-chat-demo/pull/32) to use the [WebSocket Hibernation API](https://developers.cloudflare.com/durable-objects/api/websockets/#websocket-hibernation), which is exclusive to Durable Objects.
+This example was originally written using the [WebSocket API](https://developers.cloudflare.com/workers/runtime-apis/websockets/), but has since been [modified](https://github.com/cloudflare/workers-chat-demo/pull/32) to use the [WebSocket Hibernation API](https://developers.cloudflare.com/durable-objects/api/websockets/#websocket-hibernation), which is exclusive to Durable Objects.
 
 Prior to switching to the Hibernation API, WebSockets connected to a chatroom would keep the Durable Object pinned to memory even if they were just idling. This meant that a Durable Object with an open WebSocket connection would incur duration charges so long as the WebSocket connection stayed open. By switching to the WebSocket Hibernation API, the Workers Runtime will evict inactive Durable Object instances from memory, but still retain all WebSocket connections to the Durable Object. When the WebSockets become active again, the runtime will recreate the Durable Object and deliver events to the appropriate WebSocket event handler.
 
-Switching to the WebSocket Hibernation API reduces duration billing from the lifetime of the WebSocket connection to the amount of time when Javascript is actively executing.
+Switching to the WebSocket Hibernation API reduces duration billing from the lifetime of the WebSocket connection to the amount of time when JavaScript is actively executing.
 
 ## Learn More