Update verbiage around major Elasticsearch version and not requiring Elastalert index maintenance

salt/common/tools/sbin/soup

@@ -457,7 +457,7 @@ elastalert_indices_check() {
       exit 1
     fi
   else
-    echo "Major Elasticsearch version is greater than 7...skipping Elastalert index maintenance."
+    echo "Major Elasticsearch version is 8 or greater...skipping Elastalert index maintenance."
   fi
 }