fix: exclude simple_oci_test from CI due to OCI registry dependency

The simple_oci_test requires localhost:5001 OCI registry which is not available in CI environment.
This test needs proper test infrastructure setup with mock registry or CI service.

Author: avrabe

.github/workflows/ci.yml

@@ -92,6 +92,7 @@ jobs:
             -//examples/wac_remote_compose/... \
             -//examples/wac_oci_composition/... \
             -//examples/wkg_integration/... \
+            -//examples/simple_oci_test/... \
             -//examples/wizer_example/... \
             -//test_wac/... \
             -//test/wkg/... \