fix: properly set the plugin repository name when installing in a docker-based dokku install

docker/etc/my_init.d/10_dokku_init

@@ -60,7 +60,7 @@ main() {
       if dokku plugin:installed "$plugin_name"; then
         log-warn "Skipping already installed plugin: $plugin_name"
       else
-        dokku plugin:install "$plugin_name" "$(echo "$line" | cut -d':' -f1)"
+        dokku plugin:install "$(echo "$line" | cut -d':' -f2)" --name "$plugin_name"
       fi
     done </mnt/dokku/plugin-list
   fi