Add Service Mesh work stream to JIRA API call (#15845)

.github/workflows/jira-pr.yaml

@@ -59,6 +59,7 @@ jobs:
           # customfield_10089 is "Issue Link", customfield_10371 is "Source" (use JIRA API to retrieve)
           extraFields: '{ "customfield_10089": "${{ github.event.pull_request.html_url }}",
                           "customfield_10371": { "value": "GitHub" },            
+                          "customfield_10535": [{ "value": "Service Mesh" }],
                           "components": [{ "name": "${{ github.event.repository.name }}" }],
                           "labels": ${{ steps.set-ticket-labels.outputs.LABELS }} }'
         env: