Update the small cosmo volume YAML files with the correct parameter names for...

Update the small cosmo volume YAML files with the correct parameter names for the EAGLE cooling model.

examples/SmallCosmoVolume_cooling/small_cosmo_volume.yml

@@ -66,10 +66,9 @@ LambdaCooling:
 EagleCooling:
   filename:                ./coolingtables/
   reionisation_redshift:   8.5
-  he_reion:                1
-  he_reion_z_center:       3.5
-  he_reion_z_sigma:        0.5
-  he_reion_ev_pH:          2.0
+  He_reion_z_centre:       3.5
+  He_reion_z_sigma:        0.5
+  He_reion_ev_pH:          2.0
 
 # Impose primoridal metallicity
 EAGLEChemistry: