fix: use little endian in float conversion

[Ernst79]

(fix): use little endian in float conversion (fix #143)

[codecov]

Codecov Report

Attention: Patch coverage is 33.33333% with 2 lines in your changes missing coverage. Please review.

Project coverage is 83.93%. Comparing base (7ba1380) to head (b4f5d10).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
src/bthome_ble/parser.py	33.33%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #197   +/-   ##
=======================================
  Coverage   83.93%   83.93%           
=======================================
  Files           6        6           
  Lines         523      523           
  Branches       78       78           
=======================================
  Hits          439      439           
  Misses         68       68           
  Partials       16       16           

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