[processing][grass] Fix incorrect name for i.albedo parameter

Author: nyalldawson

python/plugins/processing/algs/grass7/description/i.albedo.txt

@@ -5,7 +5,7 @@ QgsProcessingParameterMultipleLayers|input|Name of input raster maps|3|None|Fals
 QgsProcessingParameterBoolean|-m|MODIS (7 input bands:1,2,3,4,5,6,7)|False
 QgsProcessingParameterBoolean|-n|NOAA AVHRR (2 input bands:1,2)|False
 QgsProcessingParameterBoolean|-l|Landsat 5+7 (6 input bands:1,2,3,4,5,7)|False
-QgsProcessingParameterBoolean|-l|Landsat 8 (7 input bands:1,2,3,4,5,6,7)|False
+QgsProcessingParameterBoolean|-8|Landsat 8 (7 input bands:1,2,3,4,5,6,7)|False
 QgsProcessingParameterBoolean|-a|ASTER (6 input bands:1,3,5,6,8,9)|False
 QgsProcessingParameterBoolean|-c|Aggressive mode (Landsat)|False
 QgsProcessingParameterBoolean|-d|Soft mode (MODIS)|False