fix: handle UnsupportedFeature exception in UpdateCoordinator

[firstof9]

fixes #412

[codecov]

Codecov Report

Attention: Patch coverage is 25.00000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 86.43%. Comparing base (b6e4cfd) to head (b1898a5).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
custom_components/openevse/__init__.py	25.00%	3 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #413   +/-   ##
=======================================
  Coverage   86.43%   86.43%           
=======================================
  Files          14       14           
  Lines        1084     1084           
=======================================
  Hits          937      937           
  Misses        147      147           

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