fix: Use latest stable flutter

Author: PMax5

frontend/Dockerfile_staging

@@ -6,7 +6,7 @@ RUN apt-get clean
 
 # Clone the flutter repo
 # Temporary fix while the cuppertino_icons package is not fixed to work with Flutter 3.13.0 (latest stable release).
-RUN git clone --branch 3.10.6 https://github.com/flutter/flutter.git /usr/local/flutter
+RUN git clone https://github.com/flutter/flutter.git /usr/local/flutter
 
 # Set flutter path
 ENV PATH="/usr/local/flutter/bin:/usr/local/flutter/bin/cache/dart-sdk/bin:${PATH}"