[SIEM] Fix Welcome to SIEM typo (#56582) (#56609)

x-pack/legacy/plugins/siem/public/pages/common/translations.ts

@@ -12,7 +12,7 @@ export const EMPTY_TITLE = i18n.translate('xpack.siem.pages.common.emptyTitle',
 
 export const EMPTY_MESSAGE = i18n.translate('xpack.siem.pages.common.emptyMessage', {
   defaultMessage:
-    'To begin using security information and event management, you’ll need to begin adding SIEM-related data to Kibana by installing and configuring our data shippers, called Beats. Let’s do that now!',
+    'To begin using security information and event management (SIEM), you’ll need to add SIEM-related data, in Elastic Common Schema (ECS) format, to the Elastic Stack. An easy way to get started is by installing and configuring our data shippers, called Beats. Let’s do that now!',
 });
 
 export const EMPTY_ACTION_PRIMARY = i18n.translate('xpack.siem.pages.common.emptyActionPrimary', {