Fix translations for system-channel-type electric:energy (#4912)

Signed-off-by: Christoph Weitkamp <github@christophweitkamp.de>

Author: cweitkamp

bundles/org.openhab.core.thing/src/main/resources/OH-INF/i18n/DefaultSystemChannels.properties

@@ -54,7 +54,7 @@ channel-type.system.electric-current.label = Electric Current
 channel-type.system.electric-current.description = Current electric current
 channel-type.system.electric-voltage.label = Electric Voltage
 channel-type.system.electric-voltage.description = Current electric voltage
-channel-type.system.electrical-energy.label = Electrical Energy
-channel-type.system.electrical-energy.description = Current electrical energy
+channel-type.system.electric-energy.label = Electric Energy
+channel-type.system.electric-energy.description = Current electric energy
 channel-type.system.uv-index.label = UV Index
 channel-type.system.uv-index.description = Current UV index