Added resources for Basics of SEO in Frontend Development Roadmap (#1169)

* Added resources for Basics of SEO in Frontend Development Roadmap

* Update content/roadmaps/100-frontend/content/101-html/105-seo-basics.md

Co-authored-by: Kamran Ahmed <kamranahmed.se@gmail.com>

content/roadmaps/100-frontend/content/101-html/105-seo-basics.md

@@ -8,3 +8,5 @@ SEO or Search Engine Optimization is the technique used to optimize your website
 <BadgeLink colorScheme='yellow' badgeText='Read' href='https://developers.google.com/search/docs'>Google Search Central — SEO Docs</BadgeLink>
 <BadgeLink colorScheme='yellow' badgeText='Read' href='https://github.com/seo/guide'>SEO Guide</BadgeLink>
 <BadgeLink colorScheme='yellow' badgeText='Read' href='https://medium.com/welldone-software/seo-for-developers-a-quick-overview-5b5b7ce34679'>SEO for Developers</BadgeLink>
+<BadgeLink badgeText='Watch' href='https://www.youtube.com/watch?v=xsVTqzratPs'>Complete SEO Course for Beginners</BadgeLink>
+<BadgeLink badgeText='Watch' href='https://www.youtube.com/watch?v=SnxeXZpZkI0'>SEO Expert Course</BadgeLink>