Ignore /dev/ttyACM when detecting Raspbee

[puddly]

Seen here: home-assistant/core#153394 (comment)

[codecov]

Codecov Report

❌ Patch coverage is 90.90909% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 99.14%. Comparing base (96b2572) to head (c5243e3).
⚠️ Report is 1 commits behind head on dev.

Files with missing lines	Patch %	Lines
zigpy_deconz/zigbee/application.py	75.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##              dev     #274   +/-   ##
=======================================
  Coverage   99.13%   99.14%           
=======================================
  Files           7        7           
  Lines         923      931    +8     
=======================================
+ Hits          915      923    +8     
  Misses          8        8           

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