Add BrowserStack to the acknowledgements
Add BrowserStack to the acknowledgements

Thanks to them for helping HABPanel's testing by providing a free account.

Signed-off-by: Yannick Schaus <face5a63a8428ad87d6296bffc09b2e4f855592a@schaus.net>
openhab/org.openhab.ui.habpanel,ghys/habpanel,openhab/org.openhab.ui.habpanel,openhab/org.openhab.ui.habpanel,openhab/org.openhab.ui.habpanel,ghys/habpanel,ghys/habpanel,ghys/habpanel