updating pixel DQ webdisplay with new histogram name convention

after change in the histogram name convention in Athena monitoring for Pixel DQ histogram

!38446 (diffs)

this MR propagate the new histogram name convention also for Offline Pixel DQWebDisplay. Example of new display here:

https://atlasdqm.cern.ch/webdisplay/test/2/HIST/run_330470/run/

pinging @ytakubo and @ibragimo

DataQuality/DataQualityConfigurations/config/Pixel/collisions_run.config

@@ -1916,6 +1916,7 @@ dir Pixel {
     }
   }
 }
+
 # now get the pixel relevant plots from InDetGlobal
 dir InDetGlobal {
   dir Pixel {