Prepare Moore v55r12p3

[ci skip]

ReleaseNotes/v55r12p3.md

+2024-09-10 Moore v55r12p3
+===
+
+This version uses
+Allen [v4r12p2](../../../../Allen/-/tags/v4r12p2),
+Rec [v36r12p2](../../../../Rec/-/tags/v36r12p2),
+Lbcom [v35r12](../../../../Lbcom/-/tags/v35r12),
+LHCb [v55r12](../../../../LHCb/-/tags/v55r12),
+Detector [v1r35](../../../../Detector/-/tags/v1r35),
+Gaudi [v38r1](../../../../Gaudi/-/tags/v38r1) and
+LCG [105a](http://lcginfo.cern.ch/release/105a/) with ROOT 6.30.0.
+
+This version is released on the `2024-patches` branch.
+Built relative to Moore [v55r12p2](/../../tags/v55r12p2), with the following changes:
+
+### New features ~"new feature"
+
+- Upstream project highlights :star:
+
+
+### Fixes ~"bug fix" ~workaround
+
+- Upstream project highlights :star:
+- Fix helium HLT2 lines (option 2), !3809 (@hjage), goes with Rec!4061
+
+### Enhancements ~enhancement
+
+- Upstream project highlights :star:
+
+
+### Code cleanups and changes to tests ~modernisation ~cleanup ~testing
+
+- Upstream project highlights :star:
+
+
+### Documentation ~Documentation
+
+- Update CODEOWNERS, !3796 (@nskidmor)
+
+### Other
+
+- Prescale the muon shower lines, !3814 (@decianm)