Backport new UCM configs to 1.2.6 or document preferred upgrade method

alsa-project/alsa-ucm-conf issue #222 was opened from micimize:

In ubuntu the latest available `alsa-utils` is `1.2.6`, so `alsaucm reload` throws a syntax error: ``` $ alsaucm reload ALSA lib ucm_cond.c:155:(if_eval_regex_match) RegexMatch error (If.Condition.Regex) ALSA lib main.c:1541:(snd_use_case_mgr_open) error: failed to import hw:1 use case configuration -22 alsaucm: error failed to open sound card hw:1: Invalid argument ```

Issue URL : https://github.com/alsa-project/alsa-ucm-conf/issues/222 Repository URL: https://github.com/alsa-project/alsa-ucm-conf