Update 4.5 hero image to use swagger-api-endpoints webapi screenshot

Author: workcontrolgit

blogs/series-4-playwright-testing/4.5-playwright-api-testing.md

@@ -8,7 +8,7 @@ Playwright's `request` fixture gives you a bare HTTP client that shares nothing
 
 The challenge in an OAuth 2.0 app is getting the token programmatically. This article shows how the **AngularNetTutorial** project solves it — by launching a temporary headless browser, completing the real OIDC flow, extracting the token, and then using it for direct API calls with full CRUD coverage.
 
-![API Testing](https://raw.githubusercontent.com/workcontrolgit/AngularNetTutorial/master/docs/images/angular/employee-list-page.png)
+![API Testing](https://raw.githubusercontent.com/workcontrolgit/AngularNetTutorial/master/docs/images/webapi/swagger-api-endpoints.png)
 
 📖 **Tutorial Repository:** [AngularNetTutorial on GitHub](https://github.com/workcontrolgit/AngularNetTutorial)