Describe the bug
The comment added to the task doesn't notify people. It would be great if we could notify the same people from the last comment or the people that are following the task comments.

To Reproduce
Steps to reproduce the behaviour:

1. Create a task, add some people as comment followers
2. Create a PR and reference the task
3. Check the task comment notifications

Expected behaviour
Those people following the task comments to be notified.

Additional context
Nobody is notified.