docs(chore): Add devrel group for tagging

.github/ISSUE_TEMPLATE/camunda-community-hub-pull-request-template.md

@@ -41,4 +41,4 @@ assignees: ''
 - [ ] I have added or suggested tests to cover my changes suggested in this pull request.
 - [ ] All new and existing CI/CD tests passed.
 - [ ] I will /assign myself this issue, and add the relevant [issue labels] to it if they are not automatically generated by Probot.
-- [ ] I will tag @celanthe in a new comment on this issue if 30 days have passed since my pull request was opened and I have not received a response from the extension's Maintainer
+- [ ] I will tag @camunda-community-hub/devrel in a new comment on this issue if 30 days have passed since my pull request was opened and I have not received a response from the extension's Maintainer