docs: fix example repo link in custom test (#5489)

Signed-off-by: Ryan King <[email protected]>

Author: ryantking

website/content/en/docs/testing-operators/scorecard/custom-tests.md

@@ -311,7 +311,7 @@ connection to invoke the Kube API.
 [basic_tests]: https://github.com/operator-framework/operator-sdk/blob/09c3aa14625965af9f22f513cd5c891471dbded2/internal/scorecard/tests/basic.go
 [config_yaml]: https://github.com/operator-framework/operator-sdk/blob/09c3aa14625965af9f22f513cd5c891471dbded2/internal/scorecard/testdata/bundle/tests/scorecard/config.yaml
 [scorecard_main_func]: https://github.com/operator-framework/operator-sdk/blob/09c3aa14625965af9f22f513cd5c891471dbded2/images/scorecard-test/main.go
-[custom_scorecard_repo]: https://github.com/operator-framework/operator-sdk
+[custom_scorecard_repo]:https://github.com/operator-framework/operator-sdk/tree/master/testdata/go/v3/memcached-operator 
 [user_doc]: /docs/testing-operators/scorecard/
 [scorecard_binary]: https://github.com/operator-framework/operator-sdk/blob/09c3aa14625965af9f22f513cd5c891471dbded2/images/custom-scorecard-tests/main.go
 [sample_makefile]: https://github.com/operator-framework/operator-sdk/blob/09c3aa14625965af9f22f513cd5c891471dbded2/Makefile