Update SPECIFICATION.md

Author: scmacdon

scenarios/basics/inspector/SPECIFICATION.md

@@ -115,7 +115,7 @@ The table below describes the exceptions handled in the program for each action.
 | `batchGetFindingDetails`            | `ResourceNotFoundException`      | Prints AWS service error details and rethrows the exception.         |
 
 
-## Metadata
+## Metadata Keys
 
 | Action / Scenario                        | Metadata File           | Metadata Key                  |
 |-----------------------------------------|------------------------|-------------------------------|