[Security Solution] Modal says "duplicating 0 rules" when you duplica…

…te an individual rule (#163908)

 ## What does this PR do?
 * It fixes the count on the duplicate modal when duplicating an individual rule.
 
 ## Issue References
Fixes #162035
 
 ## Video/Screenshot Demo
 ##### Steps to reproduce & Fix:
https://www.loom.com/share/931e42c1490d4483958b8f98dc0ba534?sid=07c67df5-b380-41a5-90f1-f64f326a12d9

___
 
 This code was written and reviewed by GitStart Community. Growing future engineers, one PR at a time.

x-pack/plugins/security_solution/public/detection_engine/rule_management_ui/components/rules_table/rules_tables.tsx

@@ -249,7 +249,7 @@ export const RulesTables = React.memo<RulesTableProps>(({ selectedTab }) => {
 
   const shouldShowLinearProgress = (isFetched && isRefetching) || isUpgradingSecurityPackages;
   const shouldShowLoadingOverlay = (!isFetched && isRefetching) || isPreflightInProgress;
-  const numberOfSelectedRules = isAllSelected ? pagination.total : selectedRuleIds?.length ?? 1;
+  const rulesCount = Math.max(isAllSelected ? pagination.total : selectedRuleIds?.length ?? 0, 1);
 
   return (
     <>
@@ -302,7 +302,7 @@ export const RulesTables = React.memo<RulesTableProps>(({ selectedTab }) => {
         <BulkActionDuplicateExceptionsConfirmation
           onCancel={cancelRuleDuplication}
           onConfirm={confirmRuleDuplication}
-          rulesCount={numberOfSelectedRules}
+          rulesCount={rulesCount}
         />
       )}
       {isBulkEditFlyoutVisible && bulkEditActionType !== undefined && (