fix #656: attempt to find runs in subtitle if not in title

[gotofritz]

Sometimes the object 'runs' is not to be found within title, but within
subtitle. This PR makes ytmusicapi look in both places.

Closes #656

[codecov]

Codecov Report

Attention: Patch coverage is 91.66667% with 1 line in your changes missing coverage. Please review.

Project coverage is 95.03%. Comparing base (e995ae5) to head (0138c18).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
ytmusicapi/parsers/playlists.py	90.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #657      +/-   ##
==========================================
- Coverage   95.15%   95.03%   -0.13%     
==========================================
  Files          38       38              
  Lines        2290     2274      -16     
==========================================
- Hits         2179     2161      -18     
- Misses        111      113       +2     

Flag	Coverage Δ
unittests	95.03% <91.66%> (-0.13%)	⬇️

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[sigma67]

@gotofritz I would like to merge the fix but as you can tell from the pipeline I cannot reproduce.. In the second commit I removed your fix and the result is the same, no crash (despite adding a test for the playlist you provided).

It seems this bug is only present when you own the playlist?

Here is a screenshot what it looks like for me, logged in.

You could also test if the issue also occurs with a non-authenticated account for you.

[gotofritz]

Yeah it's not happening any more, it must have been a short lived glitch. The playlists have titles again and they now appear in my list. FYI, my account was suspended out of the blue for three hours and then restored, not sure what happened there but this must have been part of it. Thanks for your time, not sure what you want to do with this PR now, up to you.