Update build.yml

Signed-off-by: Werner Fleischer <70745309+wfleischer@users.noreply.github.com>

Author: wfleischer

.github/workflows/build.yml

@@ -34,8 +34,8 @@ jobs:
           echo $GOOGLE_PLAYSTORE_JKS_BASE64 | base64 --decode > android/GooglePlaystore.jks
 
       - run: pwd
-      - run: tail -n 1 android/key.properties
-      - run: echo $GOOGLE_PLAYSTORE_JKS_BASE64 | tail -c 10 
+      - run: grep storeFile android/key.properties
+      - run: echo $GOOGLE_PLAYSTORE_JKS_BASE64 | tail -c 20 
       - run: ls -R
       - run: flutter --version
       - run: flutter pub get