fix: correct MDN typo and update whitespace link (#9460)

* fix: correct MDN typo and update whitespace link

* fix: correct another MDN typo in the doctype item

* fix: revert unintended newline changes

src/data/roadmaps/html/content/doctype@VscH3rVqpX29vaKmdCMop.md

@@ -4,6 +4,6 @@ The `<!DOCTYPE>` declaration is an instruction to the web browser about the HTML
 
 Visit the following resources to learn more:
 
-- [@article@Doctype | DMN docs](https://developer.mozilla.org/en-US/docs/Glossary/Doctype)
+- [@article@Doctype | MDN docs](https://developer.mozilla.org/en-US/docs/Glossary/Doctype)
 - [@article@What is the DOCTYPE Declaration in HTML?](https://www.freecodecamp.org/news/what-is-the-doctype-declaration-in-html/)
 - [@video@HTML DOCTYPE | Standards vs Quirks mode | HTML 5 Tutorial](https://www.youtube.com/watch?v=G1MOlh5uJYE)

src/data/roadmaps/html/content/whitespaces@IUsaaRxiuOn3y9uYbpsJ0.md

@@ -4,5 +4,5 @@ Whitespaces in HTML refer to the spaces, tabs, and line breaks that are used to
 
 Visit the following resources to learn more:
 
-- [@article@Handling whitespace | DMN docs](https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_text/Whitespace)
+- [@article@Handling whitespace | MDN docs](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Text/Whitespace)
 - [@video@Whitespace in HTML](https://www.youtube.com/watch?v=XhItAZTTSR8)