Prepare LHCb v55r3

[ci skip]

CMakeLists.txt

@@ -11,7 +11,7 @@
 cmake_minimum_required(VERSION 3.15)
 option(CMAKE_EXPORT_COMPILE_COMMANDS "Enable/Disable output of compile_commands.json" ON)
 
-project(LHCb VERSION 55.2
+project(LHCb VERSION 55.3
         LANGUAGES CXX)
 
 # Enable testing with CTest/CDash

ReleaseNotes/v55r3.md

+2024-03-18 LHCb v55r3
+===
+
+This version uses
+Gaudi [v38r1](../../../../Gaudi/-/tags/v38r1),
+Detector [v1r28](../../../../Detector/-/tags/v1r28) and
+LCG [105a](http://lcginfo.cern.ch/release/105a/) with ROOT 6.30.04.
+
+This version is released on the `master` branch.
+Built relative to LHCb [v55r2](/../../tags/v55r2), with the following changes:
+
+### New features ~"new feature"
+
+
+
+### Fixes ~"bug fix" ~workaround
+
+
+
+### Enhancements ~enhancement
+
+- ~Configuration ~Decoding ~Persistency | Add option to ANNSvc to publish decoding keys to monitoring hub, and read decoding keys from FSR, !4404 (@graven)
+
+
+### Code cleanups and changes to tests ~modernisation ~cleanup ~testing
+
+- ~Tracking ~PID | SIMD ML inference backend, !4305 (@mveghel)
+
+
+### Documentation ~Documentation
+
+
+### Other
+