Add User-Agent, fixes 403 spam

html/src/app.js

@@ -344,6 +344,9 @@ speechSynthesis.getVoices();
         var init = {
             url: `https://api.vrchat.cloud/api/1/${endpoint}`,
             method: 'GET',
+            headers: {
+                'User-Agent': `VRCX ${$app.appVersion}`
+            },
             ...options
         };
         var { params } = init;