use flutter 3.22

Author: Dieterbe

.github/workflows/build-release.yml

@@ -26,7 +26,7 @@ jobs:
  uses: subosito/flutter-action@v2
  with:
  channel: stable
- flutter-version: 3.19.x
+ flutter-version: 3.22.x
 
  - name: Flutter info
  run: |

README.md

@@ -43,7 +43,7 @@ Alternatively, you can use the test server (the db is reset every day):
 Install Flutter and all its dependencies, and create a new virtual device:
 <https://flutter.dev/docs/get-started/install>.
 
-The app currently uses flutter 3.19
+The app currently uses flutter 3.22
 
 ### 3
 The application will complain about an API key not being set. You can just