Added ignore pattern related to PropertyProxy to post.sh
In the context of another MR: !41584 (merged) I had to cycle the CI because of transitional issue:
+Py:PropertyProxy WARNING Found 1 duplicates among the 1035 genConfDb files :
+Py:PropertyProxy WARNING --------------------------------------------------
+Py:PropertyProxy WARNING -<component name>: <module> - [ <duplicates> ]
+Py:PropertyProxy WARNING --------------------------------------------------
+Py:PropertyProxy WARNING -TrigComboHypoTool: TrigComboHypo.TrigComboHypoConf - ['TrigHypoCommonTools.TrigHypoCommonToolsConf', 'TrigHypoCommonTools.TrigHypoCommonToolsConf']
+Py:PropertyProxy WARNING Fix your cmt/requirements file !!
``
In this MR ignore pattern is updated to ignore these lines.
FI @fwinkl @ssnyder
PS. It is a bit blind fix because I was never able to reproduce the issue locally.