Add schedule rule on workflow

manifest-pipeline-yocto.yml

@@ -49,6 +49,7 @@ workflow:
     - if: $CI_PIPELINE_SOURCE == "api"
     - if: $CI_PIPELINE_SOURCE == "pipeline"
     - if: $CI_PIPELINE_SOURCE == "web"
+    - if: $CI_PIPELINE_SOURCE == "schedule"
     # Do not run pipelines for merge requests
     - if: $CI_MERGE_REQUEST_IID
       when: never
@@ -70,6 +71,7 @@ workflow:
     - if: $CI_PIPELINE_SOURCE == "api"
     - if: $CI_PIPELINE_SOURCE == "pipeline"
     - if: $CI_PIPELINE_SOURCE == "web"
+    - if: $CI_PIPELINE_SOURCE == "schedule"
     # Trigger the pipeline on schedule basis (for weekly release) 
 
   stage: manifest-pipeline