This commit corrects the hash key used to access device readings in the
Weather.pm module. All instances of the lowercase 'readings' hash key
have been changed to the uppercase 'READINGS', which is the standard
convention in FHEM. This fixes potential issues where weather data
wasn't being properly accessed or displayed because the module was
looking for readings in the wrong hash location. The change affects
the Get function and HTML rendering methods for both vertical and
horizontal layouts.
Marko Oldenburg
437d04b87c