fix `issue` is not a valid event name

.github/workflows/test.yml

 name: 'build-test'
 on: # rebuild any PRs and main branch changes
   issue_comment:
-  issue: 
+  issues: 
     branches:
       - main
       - 'releases/*'

README.md

@@ -13,7 +13,7 @@ The action for translating non-English issues comment content to English.
 ````
 name: 'issue-comment-translator'
 on: # support issue_comment issue
-  issue:
+  issues:
   issue_comment:
     branches:
       - main
@@ -43,7 +43,7 @@ jobs:
 ````
 name: 'issue-comment-translator'
 on: # support issue_comment issue
-  issue:
+  issues:
   issue_comment:
     branches:
       - main

src/main.ts

@@ -8,7 +8,7 @@ let franc = require('franc-min')
 async function run(): Promise<void> {
   try {
     if (
-      (github.context.eventName !== 'issue_comment' && github.context.eventName != 'issue') ||
+      (github.context.eventName !== 'issue_comment' && github.context.eventName != 'issues') ||
       github.context.payload.action !== 'created'
     ) {
       core.setFailed(