Use hyphen instead of dots for version

Author: pennam

package.sh

@@ -80,6 +80,7 @@ CHKSUM=`sha256sum $FILENAME | awk '{ print $1 }'`
 SIZE=`wc -c $FILENAME | awk '{ print $1 }'`
 FLAVOUR_TAG=${FLAVOUR^^}_
 FLAVOUR_NAME=${FLAVOUR,,}
+VERSION_NAME= ${VERSION//./-}
 
 cat ArduinoCore-mbed/extras/mbed_$FLAVOUR_NAME-tag.template.json |
 sed "s/%%VERSION%%/${VERSION}/" |