fix(specify): correct self-referencing step number in validation flow (#2152)

Author: ismaelJimenez

templates/commands/specify.md

@@ -183,7 +183,7 @@ Given that feature description, do this:
 
    c. **Handle Validation Results**:
 
-      - **If all items pass**: Mark checklist complete and proceed to step 7
+      - **If all items pass**: Mark checklist complete and proceed to step 8
 
       - **If items fail (excluding [NEEDS CLARIFICATION])**:
         1. List the failing items and specific issues