docs(readme): update features

Author: kucingkode

README.md

@@ -5,8 +5,9 @@ Custom features for dev containers used in development of Omoxyz software projec
 ## Features
 
 - **Lefthook** ([lefthook](./src/lefthook/README.md)) – fast polyglot Git hooks manager to automate code checks, formatting, and tests before commits and pushes.
-- **Air** ([go-air](./src/go-air/README.md)) - live reloader for Go apps
-- **Protoc** ([protoc](./src/protoc/README.md))
+- **Air** ([go-air](./src/go-air/README.md)) - live reloader for Go apps.
+- **Protoc** ([protoc](./src/protoc/README.md)) - protocol buffer compiler.
+- **Protolint** ([protolint](./src/protolint/README.md)) - linter and fixer to enforce Protocol Buffer style and conventions.
 
 ## Usage