rename HTML function names

tests/cypress/integration/core/generateHTML.spec.ts

@@ -1,11 +1,11 @@
 /// <reference types="cypress" />
 
-import generateHtml from '@tiptap/html'
+import { generateHTML } from '@tiptap/html'
 import Document from '@tiptap/extension-document'
 import Paragraph from '@tiptap/extension-paragraph'
 import Text from '@tiptap/extension-text'
 
-describe('generateHtml', () => {
+describe('generateHTML', () => {
   it('generate HTML from JSON without an editor instance', () => {
     const json = {
       type: 'document',
@@ -18,7 +18,7 @@ describe('generateHtml', () => {
       }],
     }
 
-    const html = generateHtml(json, [
+    const html = generateHTML(json, [
       Document(),
       Paragraph(),
       Text(),