update-nc.sh: Convert mysql charset if necessary

Author: theCalcaholic

bin/ncp-update-nc.d/update-nc.sh

@@ -196,6 +196,7 @@ $ncc | grep -q db:add-missing-indices && $ncc db:add-missing-indices -n
 $ncc | grep -q db:add-missing-columns && $ncc db:add-missing-columns -n
 $ncc | grep -q db:add-missing-primary-keys && $ncc db:add-missing-primary-keys -n
 $ncc | grep -q db:convert-filecache-bigint && $ncc db:convert-filecache-bigint -n
+$ncc | grep -q db:convert-mysql-charset && $ncc db:convert-mysql-charset -n
 $ncc maintenance:repair --help | grep -q -e '--include-expensive' && $ncc maintenance:repair --include-expensive
 
 # use the correct version for custom apps