Update porter_stack_stefan-testcachemultistep.yml

Author: stefanmcshane

.github/workflows/porter_stack_stefan-testcachemultistep.yml

@@ -18,7 +18,7 @@ jobs:
     - name: Setup porter
       uses: porter-dev/[email protected]
       with:
-        tagged_release: 0.56.3
+        tagged_release: v0.56.3
 
     - name: Deploy stack
       timeout-minutes: 30