Updated Automatic Import status to be GA (#1501)

Followup PR to #1500 but
fixing the value to be more correct per
#1500 (review)

Author: kgeller

solutions/security/get-started/automatic-import.md

@@ -3,9 +3,9 @@ mapped_pages:
   - https://www.elastic.co/guide/en/security/current/automatic-import.html
   - https://www.elastic.co/guide/en/serverless/current/security-automatic-import.html
 applies_to:
-  stack: all
+  stack: ga
   serverless:
-    security: all
+    security: ga
 products:
   - id: security
   - id: cloud-serverless