HQ WebUI CCU Addon 2.5.6

Changes:

• fixed update check to work with newer RaspberryMatic/CCU3 versions.

Release files + SHA256 checksum:

_{cd2f02fa40b66cca2d39706ecfb28912ea7f1a262bf6e368bf900cfb6bd0050e hq-webui_2.5.6.tar.gz}