Clarify the HasSystems card title

Signed-off-by: David Tuite <david@roadie.io>

plugins/catalog/src/components/HasSystemsCard/HasSystemsCard.test.tsx

@@ -66,7 +66,7 @@ describe('<HasSystemsCard />', () => {
       </Wrapper>,
     );
 
-    expect(getByText('Systems')).toBeInTheDocument();
+    expect(getByText('Has systems')).toBeInTheDocument();
     expect(getByText(/No system is part of this domain/i)).toBeInTheDocument();
   });
 
@@ -112,7 +112,7 @@ describe('<HasSystemsCard />', () => {
     );
 
     await waitFor(() => {
-      expect(getByText('Systems')).toBeInTheDocument();
+      expect(getByText('Has systems')).toBeInTheDocument();
       expect(getByText(/target-name/i)).toBeInTheDocument();
     });
   });

plugins/catalog/src/components/HasSystemsCard/HasSystemsCard.tsx

@@ -31,7 +31,7 @@ export const HasSystemsCard = ({ variant = 'gridItem' }: Props) => {
   return (
     <RelatedEntitiesCard
       variant={variant}
-      title="Systems"
+      title="Has systems"
       entityKind="System"
       relationType={RELATION_HAS_PART}
       columns={systemEntityColumns}