Update README to rename Dev Proxy commands to Dev Proxy Toolkit

Author: garrytrinder

README.md

@@ -23,11 +23,11 @@ The following sections describe the features that the extension contributes to V
 
 ### Commands
 
-- `Dev Proxy: Start` - Only available when Dev Proxy is not running
-- `Dev Proxy: Stop` - Only available when Dev Proxy is running
-- `Dev Proxy: Raise mock request` - Only available when Dev Proxy is running
-- `Dev Proxy: Start recording` - Only available when Dev Proxy is running
-- `Dev Proxy: Stop recording`- Only available when Dev Proxy is recording
+- `Dev Proxy Toolkit: Start` - Only available when Dev Proxy is not running
+- `Dev Proxy Toolkit: Stop` - Only available when Dev Proxy is running
+- `Dev Proxy Toolkit: Raise mock request` - Only available when Dev Proxy is running
+- `Dev Proxy Toolkit: Start recording` - Only available when Dev Proxy is running
+- `Dev Proxy Toolkit: Stop recording`- Only available when Dev Proxy is recording
 
 ### Diagnostics