Use the 'Location:' header only.

Signed-off-by: Dan Schaper <dan.schaper@pi-hole.net>

automated install/basic-install.sh

@@ -2555,7 +2555,7 @@ FTLcheckUpdate() {
             FTLversion=$(/usr/bin/pihole-FTL tag)
             local FTLlatesttag
 
-            if ! FTLlatesttag=$(curl -sI https://github.com/pi-hole/FTL/releases/latest | grep --color=never -i Location | awk -F / '{print $NF}' | tr -d '[:cntrl:]'); then
+            if ! FTLlatesttag=$(curl -sI https://github.com/pi-hole/FTL/releases/latest | grep --color=never -i Location: | awk -F / '{print $NF}' | tr -d '[:cntrl:]'); then
                 # There was an issue while retrieving the latest version
                 printf "  %b Failed to retrieve latest FTL release metadata" "${CROSS}"
                 return 3