Update search-engine-optimization-quiz.md (Ebazhanov#4628)

Updates a question in the SEO quiz that was mentioned in one of the issues.

seo/search-engine-optimization-quiz.md

@@ -616,3 +616,14 @@
 - [ ] Syntax error in the request
 
 `Explanation: The HyperText Transfer Protocol (HTTP) 301 Moved Permanently redirect status response code indicates that the requested resource has been definitively moved to the URL given by the Location headers. A browser redirects to the new URL and search engines update their links to the resource.`
+
+#### Q75. What tag should you use to signal the main topic heading of a page?
+
+- [x] `<h1>`
+- [ ] `<h0>`
+- [ ] `<strong>`
+- [ ] `<em>`
+
+
+ [Reference](https://blog.hubspot.com/marketing/header-tags)
+