feat: celeritas: require +root

Avoid errors like:

jug_dev> wdconinc@menelaos:~/git/epic$ celer-export-geant epic.gdml '' output.json
info: Using default Celeritas Geant4 options
status: Initializing Geant4 run manager
status: Initializing Geant4 geometry
info: Loading Geant4 geometry from GDML at epic.gdml
status: Building Geant4 physics tables
status: Transferring data from Geant4
status: Loading external elemental data
info: Opening JSON output at output.json
/tmp/root/spack-stage/spack-stage-celeritas-0.5.0-luyvi73exkq3jx55muwzls2cmatui6dc/spack-src/app/celer-export-geant.cc:193: critical: Runtime error: celeritas: configuration error: required dependency is disabled in this build: ROOT

spack-environment/packages.yaml

@@ -352,7 +352,7 @@ packages:
     - '@1.16-33-g3788bb4'
   py-numpy:
     require:
-    - '@1.26.1'
+    - '@1.26.4'
   py-onnx:
     require:
     - '@1.15.0'
@@ -361,7 +361,7 @@ packages:
     - '@1.18.2'
   py-pandas:
     require:
-    - '@1.5.3'
+    - '@2.2.3'
   py-particle:
     require:
     - '@0.23.0'