Update GRIB2_Template_4_153_ProductDefinitionTemplate_en.csv

correct, it should be octet 20

Co-authored-by: Anna Milan <amilan@wmo.int>

Author: sebvi

GRIB2_Template_4_153_ProductDefinitionTemplate_en.csv

@@ -8,7 +8,8 @@ Title_en,OctetNo,OctetCount,Contents_en,Note_en,noteIDs,codeTable,flagTable,Stat
 "Individual large ensemble reforecast, control and perturbed, at a horizontal level or in a horizontal layer, in a continuous or non-continuous time interval for atmospheric chemical constituents",17-18,2,Hours after reference time of data cut-off,(see Note 1),33,,,Operational
 "Individual large ensemble reforecast, control and perturbed, at a horizontal level or in a horizontal layer, in a continuous or non-continuous time interval for atmospheric chemical constituents",19,1,Minutes after reference time of data cut-off,,,,,Operational
 "Individual large ensemble reforecast, control and perturbed, at a horizontal level or in a horizontal layer, in a continuous or non-continuous time interval for atmospheric chemical constituents",20,1,Indicator of unit of time range,(see Code table 4.4),,4.4,,Operational
-"Individual large ensemble reforecast, control and perturbed, at a horizontal level or in a horizontal layer, in a continuous or non-continuous time interval for atmospheric chemical constituents",21-23,4,Forecast time in units defined by octet 18,(see Note 2),111,,,Operational
+"Individual large ensemble reforecast, control and perturbed, at a horizontal level or in a horizontal layer, in a continuous or non-continuous time interval for atmospheric chemical constituents",21-23,4,Forecast time in units defined by octet 20,(see Note 2),111,,,Operational
+
 "Individual large ensemble reforecast, control and perturbed, at a horizontal level or in a horizontal layer, in a continuous or non-continuous time interval for atmospheric chemical constituents",24,1,Type of first fixed surface,(see Code table 4.5),,4.5,,Operational
 "Individual large ensemble reforecast, control and perturbed, at a horizontal level or in a horizontal layer, in a continuous or non-continuous time interval for atmospheric chemical constituents",25,1,Scale factor of first fixed surface,,,,,Operational
 "Individual large ensemble reforecast, control and perturbed, at a horizontal level or in a horizontal layer, in a continuous or non-continuous time interval for atmospheric chemical constituents",26-30,4,Scaled value of first fixed surface,,,,,Operational