21.9 Bug fix in InDetPerfPlot_hitResidual.cxx

Fixing residual pull histograms

added 21.9 label

This merge request affects 1 package:

• InnerDetector/InDetValidation/InDetPhysValMonitoring

Adding @goetz ,@sroe as watchers

added InnerDetector review-pending-level-1 labels

CI Result SUCCESS (hash 02da0daa)

	Athena
externals
cmake
make
required tests
optional tests

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Athena: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST 42833]

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

mentioned in commit 90885010

merged