Add EP273 to Insight Calendar

[insectengine]

** If you are updating a guide, please submit your pull request to the main repository: https://github.com/quarkusio/quarkus/tree/main/docs/src/main/asciidoc **

[quarkus-bot]

Status for workflow Build

This is the status report for running Build on commit bc96ed5.

✅ The latest workflow run for the pull request has completed successfully.

It should be safe to merge provided you have a look at the other checks in the summary.

[github-actions]

🙈 The PR is closed and the preview is expired.