deb-update.bash: actually use LC_ALL and note it being poor practice

bash/deb-update.bash

@@ -8,7 +8,9 @@ set -x
 # English (US) is generally installed everywhere, flatpak and packagekit use
 # weird glyphs unavailable in C and C.utf8 is a RedHattism, which Debian
 # side of the family doesn't recognise.
-export LANG=en_US.utf8
+#export LANG=en_US.utf8
+# This is said to be a poor practice that should only be used for debugging
+export LC_ALL=en_US.utf8
 
 # if hash checks that the command exists
 if hash apt-get 2>/dev/null; then