adjust changelog menu item text and event name

src/localization/en.json

@@ -68,7 +68,7 @@
         "get_help": "GET HELP",
         "github": "VRCX on GitHub",
         "discord": "Join our Discord",
-        "whats_new": "What's New?",
+        "changelog": "Changelog",
         "update_available": "Update available",
         "update": "Update",
         "mark_all_read": "Mark All as Read",

src/localization/ja.json

@@ -45,7 +45,7 @@
         "get_help": "困った時はこちら",
         "github": "バグ報告・提案 (GitHub)",
         "discord": "みんなと話そう (Discord)",
-        "whats_new": "新機能 (更新履歴)",
+        "changelog": "新機能 (更新履歴)",
         "update_available": "更新があります！",
         "update": "更新",
         "custom_nav": {

src/localization/pl.json

@@ -27,7 +27,7 @@
         "get_help": "UZYSKAJ POMOC",
         "github": "VRCX na GitHubie",
         "discord": "Dołącz do naszego Discorda",
-        "whats_new": "Co nowego?",
+        "changelog": "Co nowego?",
         "custom_nav": {
             "header": "Edytuj nawigację",
             "dialog_title": "Edytuj menu nawigacyjne",

src/localization/zh-CN.json

@@ -45,7 +45,7 @@
         "get_help": "请求帮助",
         "github": "GitHub 仓库",
         "discord": "加入 Discord",
-        "whats_new": "更新日志",
+        "changelog": "更新日志",
         "update_available": "有新版本可用",
         "update": "更新",
         "custom_nav": {

src/localization/zh-TW.json

@@ -45,7 +45,7 @@
         "get_help": "取得協助",
         "github": "在 GitHub 上查看 VRCX",
         "discord": "加入我們的 Discord",
-        "whats_new": "最新更新",
+        "changelog": "最新更新",
         "update_available": "有可用更新",
         "update": "更新",
         "custom_nav": {