Update ignore regex for 3rdparty

[urfeex]

Codecov seems not to ignore the 3rdparty folder as it should. This PR attempts to fix that.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 73.94%. Comparing base (45aa603) to head (26aeca0).

Additional details and impacted files

@@             Coverage Diff             @@
##           master     #421       +/-   ##
===========================================
+ Coverage   42.90%   73.94%   +31.04%     
===========================================
  Files          99       97        -2     
  Lines        8675     5040     -3635     
  Branches     1181      544      -637     
===========================================
+ Hits         3722     3727        +5     
+ Misses       4671     1030     -3641     
- Partials      282      283        +1     

Flag	Coverage Δ
start_ursim	82.35% <ø> (-1.73%)	⬇️
ur5-3.14.3	72.03% <ø> (+31.26%)	⬆️
ur5e-10.7.0	63.94% <ø> (+27.96%)	⬆️
ur5e-5.9.4	72.27% <ø> (+31.32%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.