check on Jenkins plugins after 2.249.1 installed

[pcfe]

Just got this after updating Jenikins to 2.249.1

The following installed plugins are deprecated
Pipeline: Declarative Agent API
Multiple SCMs plugin

In general, this means that these plugins are either obsolete, no longer being developed, or may no longer work.
See the linked web pages for further information about the cause for the deprecation, and suggestions on how to proceed.

So I'll have to check on these. Assigning issue to self so this is not forgotten.

These two should be replacements
https://plugins.jenkins.io/pipeline-model-definition/
https://wiki.jenkins-ci.org/display/JENKINS/Pipeline+Plugin
(merci Janine)