Remove any potential issue in tag numbering for Align marketplace packages

NEXT_TAG=$(printf "%02d" $(($(expr ${CURRENT_TAG}) + 1)))

The expr expression can show an odd behavior when the value of CURRENT_TAG is 08 depending on the OS and especially on linuces.

Using the alternate BASH expression will avoid this:

NEXT_TAG=$(printf "%02d" $(( ${CURRENT_TAG#"${CURRENT_TAG%%[!0]*}"} + 1)))