Change workflow reference to 'testbench' branch

Author: nolanpro

.github/workflows/deploy-pm4.yml

@@ -9,5 +9,5 @@ on:
 jobs:
   run:
     name: Run PM4-workflow
-    uses: processmaker/.github/.github/workflows/deploy-pm4.yml@main
+    uses: processmaker/.github/.github/workflows/deploy-pm4.yml@testbench
     secrets: inherit