use new .get_probability() from zyte-common-items==0.12.0

[BurnzZ]

Following the 0.12.0 release of zyte-common-items which contains this new feature: zytedata/zyte-common-items#65

[codecov-commenter]

Codecov Report

Merging #7 (9114917) into main (755dbd8) will decrease coverage by 0.02%.
The diff coverage is 100.00%.

❗ Current head 9114917 differs from pull request most recent head 0c97bee. Consider uploading reports for the commit 0c97bee to get more accurate results

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@            Coverage Diff             @@
##             main       #7      +/-   ##
==========================================
- Coverage   99.10%   99.09%   -0.02%     
==========================================
  Files           8        8              
  Lines         449      444       -5     
==========================================
- Hits          445      440       -5     
  Misses          4        4              

Files	Coverage Δ
zyte_spider_templates/spiders/base.py	97.61% <100.00%> (-0.16%)	⬇️
zyte_spider_templates/spiders/ecommerce.py	94.23% <100.00%> (-0.22%)	⬇️