Update supported-devices.md

[jonasgustavsson]

Added notes about Wallbox

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (4551a6b) 90.51% compared to head (9737114) 90.51%.
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #986   +/-   ##
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  Coverage   90.51%   90.51%           
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  Files          10       10           
  Lines        1349     1349           
  Branches      221      221           
=======================================
  Hits         1221     1221           
  Misses         74       74           
  Partials       54       54           

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