Remove command from milestone-close workflow

Removed the 'command' line from the workflow configuration.

Author: iambibi

.github/workflows/milestone-close.yml

@@ -64,4 +64,3 @@ jobs:
           server-id: ${{ secrets.SERVER_ID }}
           source: OpenMC.jar
           target: "./plugins/update/OpenMC.jar"
-          command: omcrestart