Fixing GH workflow

.github/workflows/exporter-validate-pr.yml

@@ -15,8 +15,8 @@ jobs:
 
       - name: Fetch Base and Head References
         run: |
-          git fetch origin ${{ github.base_ref }}:${{ github.base_ref }} --depth=1 || true
-          git fetch origin ${{ github.head_ref }}:${{ github.head_ref }} --depth=1 || true
+          git fetch origin ${{ github.base_ref }} --depth=1 || true
+          git fetch origin ${{ github.head_ref }} --depth=1 || true
 
       - name: Validate JSON Changes
         run: |
@@ -59,8 +59,7 @@ jobs:
                 fi
               done
             else
-              echo "File $file exists in one branch but not the other."
-              exit 1
+              echo "Skipping file $file as it exists in one branch but not the other."
             fi
           done