bin: fix prev and next month in rofi-calendar
bin: fix prev and next month in rofi-calendar

If a number is preceded by 0, Bash treats the number as octal.
As octal is base 8 with digits ranging from 0 to 7,
08 and 09 is out of range for octal.
This will produce unexpected results between July and October.

https://askubuntu.com/a/769728

dikiaap/crispy-tux,dikiaap/dotfiles,dikiaap/crispy-tux