Update SPEC.md (#13)

bergundy · web-flow · commit 94d950f91e07 · 2024-12-19T10:25:11.000-08:00
diff --git a/SPEC.md b/SPEC.md
@@ -47,7 +47,7 @@ properties:
     type: any
     properties:
     description: |
-      Additional structured data.
+      Additional JSON serializable structured data.
 ```
 
 ### OperationInfo
