update docs

Author: ota-meshi

docs/rules/attribute-hyphenation.md

@@ -107,6 +107,10 @@ Don't use hyphenated name but allow custom attributes
 
 </eslint-code-block>
 
+## :couple: Related Rules
+
+- [vue/v-on-event-hyphenation](./v-on-event-hyphenation.md)¥
+
 ## :rocket: Version
 
 This rule was introduced in eslint-plugin-vue v3.9.0

docs/rules/v-on-event-hyphenation.md

@@ -102,6 +102,10 @@ Don't use hyphenated name but allow custom event names
 
 </eslint-code-block>
 
+## :couple: Related Rules
+
+- [vue/attribute-hyphenation](./attribute-hyphenation.md)¥
+
 ## :mag: Implementation
 
 - [Rule source](https://github.com/vuejs/eslint-plugin-vue/blob/master/lib/rules/v-on-event-hyphenation.js)