fix ci reusable workflow to checkout the correct rmg-py

Author: JacksonBurns

.github/workflows/CI.yml

@@ -58,7 +58,12 @@ jobs:
       run:
         shell: bash -l {0}
     steps:
-      - name: Checkout RMG-Py
+      - name: Checkout RMG-Py - Resuable Workflow
+        if: github.repository == 'ReactionMechanismGenerator/RMG-database'
+        uses: actions/checkout@v3
+
+      - name: Clone RMG-Py - RMG-Py
+        if: github.repository != 'ReactionMechanismGenerator/RMG-database'
         uses: actions/checkout@v3
 
       # configures the mamba environment manager and builds the environment