Update zigbee2mqtt-osram-smartplus-mini-switch.yaml

[frauhottelmann]

Blueprint Checklist

• You viewed the README and conformed to the naming conventions
• You ordered the actions as stated in the README action order
• All filenames are lowercase and uses '-' for spaces and not '_' while using {service-name}-{switch-name-or-type}.yaml format
• Images are png
• Image backgrounds are transparent and is cropped to the device boundries
• Images has a maximum width of 800px and maximum height of 500px
• There are no missing buttons or actions
• Your integration/service is running on the latest version
• You have tested your blueprints and made sure each button and action works

Zigbee2MQTT

• (older devices) You have ensured legacy is off/false for the device in the Z2M devices Settings (specific) page and that your actions matches those with legacy off?

Small correction. On and off need to be in quotes. Now everything works as expected.