Disable starlark_repository_test on postsubmit

This test was disabled on presubmit in b9a0578 but we forgot to make the corresponding change for postsubmit.

PiperOrigin-RevId: 633291774
Change-Id: I988e4d7abef6f8db83d86345dfba7e4f39c582ae

.bazelci/postsubmit.yml

@@ -374,6 +374,7 @@ tasks:
       - "-//src/test/py/bazel:bazel_yanked_versions_test"
       - "-//src/test/py/bazel:bzlmod_query_test"
       - "-//src/test/py/bazel:mod_command_test"
+      - "-//src/test/shell/bazel:starlark_repository_test"
       - "-//src/test/shell/bazel:verify_workspace"
     include_json_profile:
       - build