Changed RMS branch to marcus for CI

Author: ssun30

.github/workflows/CI.yml

@@ -107,7 +107,7 @@ jobs:
     runs-on: ubuntu-latest
     # skip scheduled runs from forks
     if: ${{ !( github.repository != 'ReactionMechanismGenerator/RMG-Py' && github.event_name == 'schedule' ) }}
-    env: 
+    env:
       # This is true only if this is a reference case for the regression testing:
       REFERENCE_JOB: ${{ github.ref == 'refs/heads/main' && github.repository == 'ReactionMechanismGenerator/RMG-Py' }}
     defaults:
@@ -158,7 +158,7 @@ jobs:
         timeout-minutes: 120 # this usually takes 20-45 minutes (or hangs for 6+ hours).
         run: |
           python -c "import julia; julia.install(); import diffeqpy; diffeqpy.install()"
-          julia -e 'using Pkg; Pkg.add(PackageSpec(name="ReactionMechanismSimulator",rev="main")); using ReactionMechanismSimulator'
+          julia -e 'using Pkg; Pkg.add(PackageSpec(name="ReactionMechanismSimulator",rev="marcus")); using ReactionMechanismSimulator'
 
       - name: Install Q2DTor
         run: echo "" | make q2dtor