fix: service calls not finding correct config_entry

[firstof9]

fixes #307

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 12 lines in your changes are missing coverage. Please review.

Project coverage is 63.20%. Comparing base (3323623) to head (f697c8b).

Files	Patch %	Lines
custom_components/openevse/services.py	0.00%	12 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #309   +/-   ##
=======================================
  Coverage   63.20%   63.20%           
=======================================
  Files          12       12           
  Lines         924      924           
=======================================
  Hits          584      584           
  Misses        340      340           

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