docs(RELEASE-1320): update tenant pipeline example pipelineRef

The pipelineRef in the tenant pipeline never really made much sense. It
suggested using a managed pipeline, which would not work (and many users
made this mistake). This updates the example to something that should be
more obviously an example and not a real pipeline.

We also moved the pipeline definitions in release-service-catalog, so
the old reference won't even exist going forward. That is another reason
to change it.

If a working tenant pipeline is created, we can update the docs to use
that as the example.

Signed-off-by: Johnny Bieren <[email protected]>

docs/modules/ROOT/pages/advanced-how-tos/releasing/tenant-release-pipelines.adoc

@@ -48,11 +48,11 @@ spec:
      resolver: git
      params:
        - name: url
-         value: "https://github.com/konflux-ci/release-service-catalog.git"
+         value: "https://github.com/<your-github-user>/<your-pipeline-repo>.git"
        - name: revision
-         value: production
+         value: main
        - name: pathInRepo
-         value: "pipelines/push-to-external-registry/push-to-external-registry.yaml"
+         value: "<path-to-your-pipeline>"
    serviceAccountName: appstudio-pipeline <.>
 ----