Add comment for branch input default value

Author: puehringer

.github/workflows/build-node-python.yml

@@ -6,6 +6,8 @@ on:
       branch:
         type: string
         required: false
+        # When using github.ref || github.head_ref, it would contain the full path, including /, which breaks the postgres hostname
+        default: ${{ github.sha }}
       cypress_enable:
         description: "Global enable for cypress"
         type: boolean