change groupname to group in seed data

cypress/e2e/group/showGroupsAndClassesInTable.feature

@@ -17,9 +17,9 @@ Feature: Group - To show groups and classes in one table with respective functio
   Scenario: As a teacher i can see all classes and groups of my school on the new class administration page.
     Given I see the new class administration page
     Then I can see the page title
-    And I can see the group 'TestSchulklasse' with source 'moin.schule'
+    And I can see the group 'Cypress-Test-Group' with source 'moin.schule'
     And I can see the class '1' without source
-    And the group 'TestSchulklasse' does not have any action items
+    And the group 'Cypress-Test-Group' does not have any action items
     And the class '1' has 4 enabled action items
 
   @stable_test

cypress/support/pages/group/pageGroups.js

@@ -1,7 +1,7 @@
 'use strict'
 
 class Groups {
-	static #cretaeClass = '[data-testid="createClass"]';
+	static #createClass = '[data-testid="createClass"]';
 	static #confirmClassCreate = '[data-testid="confirmClassCreate"]';
 	static #manageConfirm = '[data-testid="manage-confirm"]';
 	static #classTitleNew = '[data-testid="admin-class-title"]';
@@ -16,7 +16,7 @@ class Groups {
 	static #deleteDialogConfirm = '[data-testid="dialog-confirm"]';
 
 	clickCreateClass() {
-		cy.get(Groups.#cretaeClass)
+		cy.get(Groups.#createClass)
 			.click();
 	}