Make nominal weight a double as well

edm4hep.yaml

@@ -149,7 +149,7 @@ datatypes:
  - int32_t eventNumber //event number
  - int32_t runNumber //run number
  - uint64_t timeStamp //time stamp
- - float weight // event weight
+ - double weight // event weight
  VectorMembers:
  - double weights // event weights in case there are multiple. **NOTE that weights[0] might not be the same as weight!** Event weight names should be stored using the edm4hep::EventWeights name in the file level metadata.