Correct constraint message.

src/validations/constraints/fedramp-external-constraints.xml

@@ -151,7 +151,7 @@
             <expect id="leveraged-authorization-has-valid-impact-level" target="//leveraged-authorization/prop[@name='impact-level'][@ns='http://fedramp.gov/ns/oscal']/@value" test=". = $sensitivity-level-floor" level="ERROR">
                 <formal-name>Leveraged Authorization Has Valid Impact Level</formal-name>
                 <prop namespace="https://docs.oasis-open.org/sarif/sarif/v2.1.0" name="help-url" value="https://automate.fedramp.gov/documentation/ssp/4-ssp-template-to-oscal-mapping/#leveraged-fedramp-authorized-services"/>
-                <message>A FedRAMP SSP MUST define the appropriate FIPS-199 impact level (low, moderate, or high) for each leveraged authorization.</message>
+                <message>The FIPS-199 impact level of the leveraged system MUST be the same or higher than the impact level of this system.</message>
             </expect>
             <expect id="non-provider-responsible-role-references-user" target="." test="$non-provider-user-has-function-performed" level="ERROR">
                 <formal-name>Non-Provider Responsible Role References User</formal-name>