📝 docs(vuepress): tweak no-missing-key rule

Author: kazupon

docs/rules/no-missing-key.md

@@ -8,28 +8,42 @@ This rule warns locale message key missing if the key does not exist in locale m
 
 ## :book: Rule Details
 
-The methods that can be detected with this rule are as follows:
+You can be detected with this rule the following:
 
 - `$t`
 - `t`
 - `$tc`
 - `tc`
+- `v-t`
 
 :-1: Examples of **incorrect** code for this rule:
 
-```js
-const localeMessages = {
-  en: {
-    hello: 'Hello! DIO!'
-  }
-  ja: {
-    hello: 'こんにちは、DIO！'
-  }
+locale messages:
+```json
+{
+  "hello": "Hello! DIO!"
 }
+```
+
+localization codes:
 
+```vue
+<template>
+  <div class="app">
+    <!-- ✗ BAD -->
+    <p>{{ $t('hi) }}</p>
+    <!-- ✗ BAD -->
+    <p v-t="'hi'"></p>
+  </div>
+</template>
+```
+
+```js
 const i18n = new VueI18n({
   locale: 'en',
-  localeMessages
+  messages: {
+    en: require('./locales/en.json')
+  }
 })
 
 /* ✗ BAD */
@@ -38,21 +52,34 @@ i18n.t('hi')
 
 :+1: Examples of **correct** code for this rule:
 
-```js
-const localeMessages = {
-  en: {
-    hello: 'Hello! DIO!'
-  }
-  ja: {
-    hello: 'こんにちは、DIO！'
-  }
+locale messages:
+```json
+{
+  "hello": "Hello! DIO!"
 }
+```
 
+localization codes:
+
+```vue
+<template>
+  <div class="app">
+    <!-- ✗ GOOD -->
+    <p>{{ $t('hello') }}</p>
+    <!-- ✗ GOOD -->
+    <p v-t="'hello'"></p>
+  </div>
+</template>
+```
+
+```js
 const i18n = new VueI18n({
   locale: 'en',
-  localeMessages
+  messages: {
+    en: require('./locales/en.json')
+  }
 })
 
 /* ✓ GOOD */
 i18n.t('hello')
-```
+```