Update to Debian 12

[BuildWithData]

Goal: make both standup scripts work with Debian 12

Why this patch ?

• bcs wget started writing logs file as explained more in details here
• to update readme file and let users know they can run both scripts with debian 12

Other comments

• The workaround described here works however the append option -a is preferred to option -o, this way we have a single log file for wget and then it is easier to append logs to standup.log and standup.err log files

• wget command is used other 2 times in the scripts, but without sudo -u standup, ie no issues with logs here and no need to add option -a

• changes are retrocompatible and work also on Debian 11 but StandUp.sh script has been tested only

TODO

• test LinodeStandUp.sh
• test StandUp.sh
• test LinodeStandUp.sh by maintainer
• test StandUp.sh by maintainer
• do not forget to squash commits

NEXT STEPS

• if pull is approved and merged then patch also here to let users know they can run on debian 12

[shannona]

Success with both LinodeStandup and Standup shell scripts.