fix: improve README instructions

README.md

@@ -1,12 +1,14 @@
 # Custom Prompts for Github Copilot Chat
 
-Share custom prompts for Github Copilot Chat.
+Share custom prompts for Github Copilot Chat with your team.
 
 ## Usage
 
 Use `@customPrompts` to invoke the assistant, then select the desired command.
 
-Add custom prompts in `settings.json` as follows:
+### Configuration
+
+Add your custom prompts in `.vscode/settings.json` as follow:
 
 ```jsonc
 {
@@ -23,7 +25,11 @@ Add custom prompts in `settings.json` as follows:
 }
 ```
 
-Then, in the chat, enter `@customPrompts /custom /<Your Prompt name>` to invoke the custom command.
+Then, in the chat, enter `@customPrompts /load /<command>` to invoke the custom command; e.g. with the example config above: `@customPrompts /load /prefixwithlegacy`
+
+### Available Commands
+
+- `/load`: Use `@customPrompts /load /<command>` to invoke a custom command.
 
 ## Credits