fix test

apps/app/test/cypress/e2e/20-basic-features/20-basic-features--username-mention.cy.ts

@@ -29,12 +29,13 @@ context('Mention username in comment', () => {
   it('Successfully mention username in comment', () => {
     const username = 'adm';
 
+    cy.get('.comment').should('have.text', '');
+
     cy.intercept('GET', `/_api/v3/users/usernames?q=${username}&limit=20`).as('searchUsername');
     cy.get('.CodeMirror').type('@' + username);
     cy.wait('@searchUsername');
     cy.get('.CodeMirror-hints').should('be.visible');
 
-
     cy.get('#comments-container').within(() => { cy.screenshot(`${ssPrefix}1-username-found`) });
     // Click on mentioned username
     cy.get('.CodeMirror-hints > li').first().click();
@@ -44,6 +45,8 @@ context('Mention username in comment', () => {
   it('Username not found when mention username in comment', () => {
     const username = 'user';
 
+    cy.get('.comment').should('have.text', '');
+
     cy.intercept('GET', `/_api/v3/users/usernames?q=${username}&limit=20`).as('searchUsername');
     cy.get('.CodeMirror').type('@' + username);
     cy.wait('@searchUsername');