Make it easier to run workflows locally with 'act'

.github/actions/init-integ-test/action.yml

@@ -11,6 +11,7 @@ runs:
 
     # Downloads a 'dist' directory artifact that was uploaded in an earlier 'build-dist' step
     - name: Download dist
+      if: ${{ !env.ACT }}
       uses: actions/download-artifact@v4
       with:
         name: dist