fix container-registry-auth in release publish task (#1467)

Author: jkhelil

release/README.md

@@ -11,14 +11,6 @@ text editor.
 
 1. Apply release Tekton resources
 
-   - [`publish-chains-release`](release-pipeline.yaml) - This task uses
-     [ko](https://github.com/google/ko) to build all container images we release
-     and generate the `release.yaml`
-
-     ```sh
-     kubectl apply -f release/publish.yaml
-     ```
-
    - [`chains-release`](release-pipeline.yaml) - This is the pipeline that
      stitches everything together.
 

release/publish.yaml

@@ -97,7 +97,7 @@ spec:
       # Login to the container registry
       DOCKER_CONFIG=$(cat ${CONTAINER_REGISTRY_CREDENTIALS} | \
         crane auth login -u ${CONTAINER_REGISTRY_USER} --password-stdin $(params.imageRegistry) 2>&1 | \
-        sed 's,^.*logged in via \(.*\)$,\1,g')
+        sed -n 's,^.*logged in via \(.*\)$,\1,p')
 
       # Auth with account credentials for all regions.
       for region in ${REGIONS}
@@ -107,6 +107,7 @@ spec:
       done
       cp ${DOCKER_CONFIG} /workspace/docker-config.json
 
+
   - name: run-ko
     image: ghcr.io/tektoncd/plumbing/ko@sha256:990ec7fc709567e0d26fa40788a040b97598343d2fcb7252751316e34f31c4cc
     env: