[SIEM][Detections] Updates text for severity and risk_score overrides (#72244) (#72587)

* updates severity mapping description text

* updates risk score mapping description

* updates default messages with the given suggestions

Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>

Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>

Author: MadameSheema

x-pack/plugins/security_solution/public/detections/components/rules/risk_score_mapping/translations.tsx

@@ -51,7 +51,7 @@ export const RISK_SCORE_DESCRIPTION = i18n.translate(
 export const RISK_SCORE_MAPPING_DESCRIPTION = i18n.translate(
   'xpack.securitySolution.alerts.riskScoreMapping.mappingDescriptionLabel',
   {
-    defaultMessage: 'Map a field from the source event (scaled 1-100) to risk score.',
+    defaultMessage: 'Use a source event value to override the default risk score.',
   }
 );
 

x-pack/plugins/security_solution/public/detections/components/rules/severity_mapping/translations.tsx

@@ -51,7 +51,7 @@ export const SEVERITY_DESCRIPTION = i18n.translate(
 export const SEVERITY_MAPPING_DESCRIPTION = i18n.translate(
   'xpack.securitySolution.alerts.severityMapping.mappingDescriptionLabel',
   {
-    defaultMessage: 'Map a value from the source event to a specific severity.',
+    defaultMessage: 'Use source event values to override the default severity.',
   }
 );