yaml adjustment to compile on git

[tudstudent]

You might want to change the yaml to:

external_components:
  - source: github://yoziru/esphome-zehnder-comfoair
    components: [ zehnder_comfoair_q ]

This way the build will be done in ESPhome. Easier for unexperienced users (instead of make etc).

[yoziru]

This should work now with the added dashboard_import (https://github.com/yoziru/esphome-zehnder-comfoair/commit/33ddeb505e90f30e0e31d68ea02cd973874bf494)