Update pricing and extension links [alex suggestion]

Author: jdorfman

docs/cody/capabilities/chat.mdx

@@ -12,8 +12,8 @@ You can do it from the **chat** panel of the supported editor extensions ([VS Co
 
 To use Cody's chat, you'll need the following:
 
-- A Free or Pro account via Sourcegraph.com or a Sourcegraph Enterprise account
-- A supported editor extension (VS Code, JetBrains, Visual Studio) installed
+- [Sourcegraph Enterprise Starter](https://sourcegraph.com/pricing) or [Enterprise account](https://sourcegraph.com/pricing)
+- A supported editor extension [VS Code](https://marketplace.visualstudio.com/items?itemName=sourcegraph.cody-ai), [JetBrains](https://plugins.jetbrains.com/plugin/9682-cody-ai-coding-assistant-with-autocomplete--chat) installed or use via Web app
 
 ## How does chat work?
 
@@ -116,8 +116,8 @@ The enhanced chat experience input can be accessed from the chat panel of the su
 
 To use Cody's chat, you'll need the following:
 
-- Sourcegraph Enterprise Starter or Enterprise account
-- A supported editor extension (VS Code, JetBrains) installed or use via Web app
+- [Sourcegraph Enterprise Starter](https://sourcegraph.com/pricing) or [Enterprise account](https://sourcegraph.com/pricing)
+- A supported editor extension [VS Code](https://marketplace.visualstudio.com/items?itemName=sourcegraph.cody-ai), [JetBrains](https://plugins.jetbrains.com/plugin/9682-cody-ai-coding-assistant-with-autocomplete--chat) installed or use via Web app
 
 ## Key features