fix(ci): explicitly set JNML_HOME so we know where the jnml script is

Author: sanjayankur31

.github/workflows/omv-ci.yml

@@ -41,12 +41,12 @@ jobs:
         
     - name: Regenerate
       run: |
+        export JNML_HOME=/home/runner/jnml/jNeuroMLJar
+        export PATH=$JNML_HOME:$PATH
         omv install PyNN # required for regeneration...
         omv install pyNeuroML # required for regeneration...
         omv install jNeuroML
         which jnml
-        ##export JNML_HOME=/home/runner/jnml/jNeuroMLJar
-        ##export PATH=$JNML_HOME:$PATH
         ./regenerate.sh