Upercase the temp_unit

Signed-off-by: Samuel Boucher <scboucher@users.noreply.github.com>

advanced/Scripts/chronometer.sh

@@ -237,6 +237,7 @@ get_sys_stats() {
         sys_name=$(hostname)
 
         [[ -n "$TEMPERATUREUNIT" ]] && temp_unit="$TEMPERATUREUNIT" || temp_unit="c"
+        temp_unit="${temp_unit^^}"
 
         # Get storage stats for partition mounted on /
         read -r -a disk_raw <<< "$(df -B1 / 2> /dev/null | awk 'END{ print $3,$2,$5 }')"