Add missing closing parenthesis in detailed workflow

Signed-off-by: Vladimir Diaz <[email protected]>

Author: vladimir-v-diaz

tuf-spec.md

@@ -997,7 +997,7 @@ repo](https://github.com/theupdateframework/specification/issues).
 ### **The client application**
 
   Note: If a step in the following workflow does not succeed (e.g., a failure
-  is reported because a new metadata file was not signed, the client should
+  is reported because a new metadata file was not signed), the client should
   not be left in an unrecoverable state.
 
   **0**. **Load the trusted root metadata file.** We assume that a good, trusted