Update badge workflow name (#3377)

To reflect latest changes.

README.md

@@ -6,7 +6,7 @@
   <p align="center">
     <a href="https://github.com/goadesign/goa/releases/latest"><img alt="Release" src="https://img.shields.io/github/release/goadesign/goa.svg?style=for-the-badge"></a>
     <a href="https://pkg.go.dev/goa.design/goa/v3@v3.13.1/dsl?tab=doc"><img alt="Go Doc" src="https://img.shields.io/badge/godoc-reference-blue.svg?style=for-the-badge"></a>
-    <a href="https://github.com/goadesign/goa/actions/workflows/ci.yml"><img alt="GitHub Action: Build" src="https://img.shields.io/github/actions/workflow/status/goadesign/goa/ci.yml?branch=v3&style=for-the-badge"></a>
+    <a href="https://github.com/goadesign/goa/actions/workflows/ci.yml"><img alt="GitHub Action: Test" src="https://img.shields.io/github/actions/workflow/status/goadesign/goa/test.yml?branch=v3&style=for-the-badge"></a>
     <a href="https://goreportcard.com/report/github.com/goadesign/goa"><img alt="Go Report Card" src="https://goreportcard.com/badge/github.com/goadesign/goa?style=for-the-badge"></a>
     <a href="/LICENSE"><img alt="Software License" src="https://img.shields.io/badge/license-MIT-brightgreen.svg?style=for-the-badge"></a>
     </br>