[Minor] ~bugfix Fix directory exploring in TrigCost CSV export

I found that trig cost CSV exporting only works for a single top-level directory.

ATR-22335 is a full reprocessing so had two - this showed up the bug.

Simple fix.

added bugfix label

This merge request affects 1 file:

• Trigger/TrigCost/TrigCostAnalysis/util/trigCostHistToCSV.cxx

Adding @tamartin as watcher

added Trigger master review-pending-level-1 labels

CI Result SUCCESS (hash 51683d63)

	Athena	AthSimulation	AthGeneration	AnalysisBase
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
AnalysisBase: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 23289]

added review-approved label and removed review-pending-level-1 label

merged

mentioned in commit 53cee293

added sweep:ignore label