added missing return parameter in read function of FileTaskHandler

[vikramcse]

this issue occurs when invalid try_number value is passed in get logs api
FIXES: #13638

[boring-cyborg]

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[turbaszek]

This is interesting because such error should be spotted by pylint as inconsistent return statement. I think this is yet another time when I have a feeling that our pylint may not work perfectly well. CC @kaxil @ashb @potiuk

[github-actions]

The PR most likely needs to run full matrix of tests because it modifies parts of the core of Airflow. However, committers might decide to merge it quickly and take the risk. If they don't merge it quickly - please rebase it to the latest master at your convenience, or amend the last commit of the PR, and push it with --force-with-lease.

[vikramcse]

@turbaszek what should be my next step? I can see the please reabse or ammed ci build is still running
thank you

[boring-cyborg]

Awesome work, congrats on your first merged pull request!