ci: limit github-jira sync actions to a single concurrent run

to prevent race conditions when two workflows related to the same new
issue are triggered within a short interval.

.github/workflows/issue_comment.yml

@@ -3,6 +3,10 @@ name: Sync issue comments to JIRA
 # This workflow will be triggered when new issue comment is created (including PR comments)
 on: issue_comment
 
+# Limit to single concurrent run for workflows which can create Jira issues.
+# Same concurrency group is used in new_issues.yml
+concurrency: jira_issues
+
 jobs:
   sync_issue_comments_to_jira:
     name: Sync Issue Comments to Jira

.github/workflows/new_issues.yml

@@ -3,6 +3,10 @@ name: Sync issues to Jira
 # This workflow will be triggered when a new issue is opened
 on: issues
 
+# Limit to single concurrent run for workflows which can create Jira issues.
+# Same concurrency group is used in issue_comment.yml
+concurrency: jira_issues
+
 jobs:
   sync_issues_to_jira:
     name: Sync issues to Jira

.github/workflows/new_prs.yml

@@ -6,6 +6,10 @@ on:
   schedule:
     - cron: "0 * * * *"
 
+# Limit to single concurrent run for workflows which can create Jira issues.
+# Same concurrency group is used in issue_comment.yml
+concurrency: jira_issues
+
 jobs:
   sync_prs_to_jira:
     name: Sync PRs to Jira