[Crashlytics] update upload symbols cli (#10936)

Author: themiswang

Crashlytics/CHANGELOG.md

@@ -1,3 +1,6 @@
+# Unreleased
+- [fixed] Updated upload-symbols to 3.14 with an improvement to upload all dSYM files for Flutter apps
+
 # 10.6.0
 - [added] Integrated with Firebase sessions library to enable upcoming features related to session-based crash metrics. If your app uses the Crashlytics SDK, review Firebase's [data disclosure page](https://firebase.google.com/docs/ios/app-store-data-collection) to make sure that your app's privacy details in the App Store are accurate and complete.