update drone.yml

drone.yml

     - rm -rf $CONTENT
     - ls -la release ; 
       find release -type f -exec md5sum '{}' \;
-    - printf "\n\n\n======= BUILD FINISHED. =======\n\n\n"
+    - printf '\n\n\n======= BUILD FINISHED. =======\n\n\n'
 
 # http://plugins.drone.io/drone-plugins/drone-gpgsign/
 # https://github.com/drone-plugins/drone-gpgsign
       from-secret: gpg-key
     passphrase:
       from-secret: gpg-pass
-    clear_sign: true
     detach_sign: true
+    clear_sign: true
     files:
       - release/*
     excludes: