adjust app.config.js to prevent development manifest error

app.config.js

@@ -124,11 +124,12 @@ module.exports = function (config) {
       web: {
         favicon: './assets/favicon.png',
       },
-      updates: {
-        url: 'https://updates.bsky.app/manifest',
       // TODO Eventually we want to enable this for all environments, but for now it will only be used for
       // TestFlight builds
-        enabled: IS_TESTFLIGHT,
+      updates: IS_TESTFLIGHT
+        ? {
+            url: 'https://updates.bsky.app/manifest',
+            enabled: true,
             fallbackToCacheTimeout: 30000,
             codeSigningCertificate: './code-signing/certificate.pem',
             codeSigningMetadata: {
@@ -137,7 +138,8 @@ module.exports = function (config) {
             },
             checkAutomatically: 'NEVER',
             channel: UPDATES_CHANNEL,
-      },
+          }
+        : undefined,
       assetBundlePatterns: ['**/*'],
       plugins: [
         'expo-localization',