Update flutter version used by the CI to the latest

Author: matux

.github/workflows/ci.yml

@@ -11,7 +11,7 @@ jobs:
     name: Flutter version ${{ matrix.flutter_version }} (Android)
     strategy:
       matrix:
-        flutter_version: ["3.10.2"]
+        flutter_version: ["3.29.2"]
 
     steps:
       - uses: actions/checkout@v4
@@ -87,7 +87,7 @@ jobs:
     name: Flutter version ${{ matrix.flutter_version }} (iOS)
     strategy:
       matrix:
-        flutter_version: ["3.10.2"]
+        flutter_version: ["3.29.2"]
 
     steps:
       - uses: actions/checkout@v4