server/linx: update: Changed installed version detection to use zero-lines

roles/server/linx/templates/update.sh

@@ -21,10 +21,10 @@ function correctPermissions() {
 
 # Check newest version installed
 installed="$(
-  (ls "$BIN_DIR" |
-  grep --only-matching --perl-regexp '(?<=-)v\d+(\.\d+)*(?=_)' |
-  sort --version-sort --reverse --unique |
-  head --lines=1) ||
+  (find "$BIN_DIR" -type f -maxdepth 1 -printf '%f\0' |
+  grep --null-data --only-matching --perl-regexp '(?<=-)v\d+(\.\d+)*(?=_)' |
+  sort --zero-terminated --version-sort --reverse --unique |
+  head --zero-terminated --lines=1) ||
   true
 )";