Don't explicitly set target but instead fallback to the logic in the Link component

Signed-off-by: Dominik Henneke <dominik.henneke@sda-se.com>

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

@@ -170,7 +170,6 @@ describe('<AboutCard />', () => {
       'href',
       'https://github.com/backstage/backstage/edit/master/software.yaml',
     );
-    expect(editLink).toHaveAttribute('target', '_blank');
   });
 
   it('renders without "view source" link', async () => {

plugins/catalog/src/components/AboutCard/AboutCard.tsx

@@ -153,7 +153,6 @@ export function AboutCard({ variant }: AboutCardProps) {
             disabled={!entityMetadataEditUrl}
             title="Edit Metadata"
             to={entityMetadataEditUrl ?? '#'}
-            target="_blank"
           >
             <EditIcon />
           </IconButton>