bug: fix country lists in template header

.github/scripts/bl-geolite2.sh

@@ -1085,6 +1085,7 @@ function GENERATE_CONTINENTS()
         # #
 
         COUNTRY_ABBREV=$(echo "$key" | tr '[:upper:]' '[:lower:]')
+        TEMPL_COUNTRIES_LIST=""
         local count=1   # start at one, since the last step is base continent file
         for country in $(eval echo \${$COUNTRY_ABBREV${i}[@]}); do
             CONTINENT_COUNTRY_NAME=$(get_country_name "$country")