test(cypress): drop superfluous assertion about file list.

File names are now rendered in two spans
which breaks the assertion that the row contains `test.md`.

But that is nothing text should worry about anyway.

Signed-off-by: Max <max@nextcloud.com>

cypress/e2e/attachments.spec.js

@@ -361,7 +361,7 @@ describe('Test all attachment insertion methods', () => {
 	it('[share] check everything behaves correctly on the share target user side', () => {
 		// check the file list
 		cy.getFile('test.md')
-			.should('contain', 'test.md')
+			.should('exist')
 		cy.getFile('github.png')
 			.should('not.exist')
 		cy.showHiddenFiles()