Use https as a source for downstream mirror

Change-Id: Ic79c788c934f6053bd9e85eab95261777b652f7c
diff --git a/jenkins/client/job/git-mirrors/downstream/pipelines.yml b/jenkins/client/job/git-mirrors/downstream/pipelines.yml
index 8f7858e..81b9478 100644
--- a/jenkins/client/job/git-mirrors/downstream/pipelines.yml
+++ b/jenkins/client/job/git-mirrors/downstream/pipelines.yml
@@ -5,9 +5,9 @@
     jenkins_git_mirror_downstream_jobs:
       - name: pipeline-library
         downstream: mcp-ci/pipeline-library.git
-        upstream: "git@github.com:Mirantis/pipeline-library.git"
+        upstream: "https://github.com/Mirantis/pipeline-library"
         branches: master
       - name: mk-pipelines
         downstream: mk/mk-pipelines.git
-        upstream: "git@github.com:Mirantis/mk-pipelines.git"
+        upstream: "https://github.com/Mirantis/mk-pipelines"
         branches: master