docs: add dingo to the list of features in readme

Signed-off-by: Simon Emms <simon@simonemms.com>

Author: mrsimonemms

README.md

@@ -26,8 +26,10 @@ This is a series of pre-built Devcontainer image to allow local development.
 
 ## Features
 
+* [Air](./src/air)
 * [Buf](./src/buf)
 * [Cobra CLI](./src/cobra-cli)
+* [Dingo](./src/dingo)
 * [Temporal Cloud CLI](./src/tcld)
 * [Zigflow](./src/zigflow)