Build a non-debug version of the APK so it's faster at runtime

Author: Fishbowler

.github/workflows/publish.yaml

@@ -29,7 +29,7 @@ jobs:
         run: flutter pub get
 
       - name: Build Android app
-        run: flutter build apk --debug
+        run: flutter build apk
 
       - name: Build iOS app
         run: flutter build ios --debug --simulator