fix typo in unit name milimeter

metacatalog/data/units.csv

@@ -25,7 +25,7 @@ id,name,symbol,si
 24,megapascal,MPa,10^6*kg*m^-1*s^-2
 25,millisiemens per centimeter,mS/cm,S*m^-1
 101,degree Celsius,C,K
-102,milimeter,10^-3*m
+102,millimeter,10^-3*m
 103,mm per day,mm/d,10^-3*m*86400^-1*s^-1
 104,hectopascal,10^2*Pa
 105,mm per hour,mm/h,10^-3*m*3600^-1*s^-1