fix(cypress): correct import path for relocated heading-change-manually test

The file was moved from editor/ (depth 1) to editor/heading/change/
(depth 3) but the import path was only updated for one extra level
instead of two. Fix ../../../ to ../../../../ for support/commands
and fixtures/docMaker.

Made-with: Cursor

Author: HMarzban

packages/webapp/cypress/e2e/editor/heading/change/heading-change-manually.cy.js

@@ -1,6 +1,6 @@
 /* eslint-disable no-undef */
-import { TEST_TITLE, TEST_CONTENT } from '../../../support/commands'
-import { section, paragraph, heading } from '../../../fixtures/docMaker'
+import { TEST_TITLE, TEST_CONTENT } from '../../../../support/commands'
+import { section, paragraph, heading } from '../../../../fixtures/docMaker'
 
 const DocumentStructureSchema1 = {
   documentName: TEST_TITLE.HelloDocy,