tdarr: fix upgrade regex

[swensorm]

Noticed this morning that Tdarr has not upgraded for several versions. I believe it's due to the regex having _ffmpeg5 as a required suffix. Tdarr has suffixed _ffmpeg5 on some image tags but not the most recent, and sometimes used 4 version segments according to the tag history on DockerHub; https://hub.docker.com/r/haveagitgat/tdarr/tags.

Updated the regex in the upgrade_strategy to support both scenarios. Also removed the string quotes on the tag - likely not the issue but consistent with other applications.

Please let me know if you would like an Issue ticket for this as well. Thank you very much!

[swensorm]

Thanks @stavros-k! TBH I was confused by python's docs as some specify only 3 (https://packaging.pypa.io/en/stable/version.html) but others show the release segment with an arbitrary wildcard of digits (https://packaging.python.org/en/latest/specifications/version-specifiers/#version-specifiers), so I tested out in a python:3 container and looks to be parsing all fo them into a tuple:

>>> parse_version('1.2.3.4.5.6')
<Version('1.2.3.4.5.6')>
>>> parse_version('1.2.3.4.5.6') > parse_version('1.2.3.4.5.5')
True

Found other apps like Collabora that have 5 in their regex, and emby with 4 so I think it should work 🙏