fix: use correct extend

Signed-off-by: Matthias Pichler <m.pichler@warrify.com>

Author: matthias-pichler

examples/mock-service-extension.yaml

@@ -6,8 +6,8 @@ document:
 use:
   extensions:
     - name: mockService
-      extend: http
-      when: ($task.with.uri != null and ($task.with.uri | startswith("https://mocked.service.com"))) or ($task.with.endpoint.uri != null and ($task.with.endpoint.uri | startswith("https://mocked.service.com")))
+      extend: call
+      when: ($task.with.endpoint != null and ($task.with.endpoint | startswith("https://mocked.service.com"))) or ($task.with.endpoint.uri != null and ($task.with.endpoint.uri | startswith("https://mocked.service.com")))
       before:
         - set:
             statusCode: 200