Add logo for siemens hvac binding

[netlify[bot]]

✅ Thanks for your pull request to the openHAB documentation! The result can be previewed at the URL below (this comment and the preview will be updated if you add more commits).

Built without sensitive environment variables

Name	Link
🔨 Latest commit	c0c76b46ce8a4e9e10e9bfe968893f4dbeff838e
🔍 Latest deploy log	https://app.netlify.com/sites/openhab-docs-preview/deploys/668284a5ebd7df00087b5eac
😎 Deploy Preview	https://deploy-preview-2324--openhab-docs-preview.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.