Update elsa-studio.yml (#6715)

Author: sfmskywalker

.github/workflows/elsa-studio.yml

@@ -29,7 +29,7 @@ jobs:
         with:
           # list of Docker images to use as base name for tags
           images: |
-            elsaworkflows/elsa-studio-v3-4-0-preview
+            elsaworkflows/elsa-studio-v3-7-0-preview
           flavor: |
             latest=true
           # generate Docker tags based on the following events/attributes