docs: update README

Co-authored-by: Christopher Junk <[email protected]>

Author: maximiliantech

README.md

@@ -17,7 +17,7 @@ OpenMCP-testing helps to set up e2e test suites for openmcp applications. Like [
 You need [go](https://go.dev/) and [docker](https://www.docker.com/) to execute the sample test suite.
 
 ```shell
-    go test -v ./e2e/...
+    task e2e
 ```
 
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