chore: Adds even more topics to task-7

Author: Ubax

task-7/README.md

@@ -11,4 +11,6 @@ Here are topics that were not covered by the previous tasks:
 - [Scheduled workflows](https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#schedule)
 - [Issues & project management](https://docs.github.com/en/actions/managing-issues-and-pull-requests/using-github-actions-for-project-management)
 - [Running docker container in workflow](https://docs.github.com/en/actions/using-containerized-services/about-service-containers)
-- [Custom actions](https://docs.github.com/en/actions/creating-actions/about-custom-actions)
+- [Custom actions](https://docs.github.com/en/actions/creating-actions/about-custom-actions)
+- [Concurrency](https://docs.github.com/en/actions/using-jobs/using-concurrency)
+- [Permissions](https://docs.github.com/en/actions/using-jobs/assigning-permissions-to-jobs)