Fix broken image in context retrieval (#595)

- https://sourcegraph.slack.com/archives/C07CNJTGB3Q/p1724408474932039

Author: MaedahBatool

docs/cody/clients/install-vscode.mdx

@@ -172,7 +172,7 @@ Cody defaults to showing @-mention context chips for all the context it intends
 
 When you start a new Cody chat, the chat input window opens with a default `@-mention` context chips for all the context it intends to use. This context is based on your current repository and current file (or a file selection if you have code highlighted).
 
-![context-retrieval](https://storage.googleapis.com/sourcegraph-assets/Docs/context-retrieval-0724.png)
+![context-retrieval](https://storage.googleapis.com/sourcegraph-assets/Docs/context-retrieval-0724.jpg)
 
 At any point in time, you can edit these context chips or remove them completely if you do not want to use these as context. Any chat without a context chip will instruct Cody to use no codebase context. However, you can always provide an alternate `@-mention` file or symbols to let Cody use it as a new source of context.