docs: add related rules

Author: FloEdelmann

docs/rules/multiline-html-element-content-newline.md

@@ -143,11 +143,10 @@ This rule enforces a line break before and after the contents of a multiline ele
 
 </eslint-code-block>
 
-## :books: Further Reading
+## :couple: Related Rules
 
-- [no-multiple-empty-lines]
-
-[no-multiple-empty-lines]: https://eslint.org/docs/rules/no-multiple-empty-lines
+- [vue/singleline-html-element-content-newline](./singleline-html-element-content-newline.md)
+- [no-multiple-empty-lines](https://eslint.org/docs/rules/no-multiple-empty-lines)
 
 ## :rocket: Version
 

docs/rules/singleline-html-element-content-newline.md

@@ -110,6 +110,10 @@ This rule enforces a line break before and after the contents of a singleline el
 
 </eslint-code-block>
 
+## :couple: Related Rules
+
+- [vue/multiline-html-element-content-newline](./multiline-html-element-content-newline.md)
+
 ## :rocket: Version
 
 This rule was introduced in eslint-plugin-vue v5.0.0