fix(switch_klipper_repo): use of case didn't allow selections of 2 and above

Signed-off-by: Dominik Willner <th33xitus@gmail.com>

scripts/switch_klipper_repo.sh

@@ -43,11 +43,16 @@ function change_klipper_repo_menu() {
   back_help_footer
 
   local option
+  local num="^[0-9]+$"
+  local back="^(B|b)$"
+  local help="^(H|h)$"
+
   while true; do
     read -p "${cyan}###### Perform action:${white} " option
-    case "${option}" in
-      0 | "$(( option < ${#repos[@]} ))")
+
+    if [[ ${option} =~ ${num} && ${option} -lt ${#repos[@]} ]]; then
       select_msg "Repo: ${repos[option]} Branch: ${branches[option]}"
+
       if [[ -d ${KLIPPER_DIR} ]]; then
         top_border
         echo -e "|                   ${red}!!! ATTENTION !!!${white}                   |"
@@ -77,19 +82,18 @@ function change_klipper_repo_menu() {
         set_custom_klipper_repo "${repos[${option}]}" "${branches[${option}]}"
         ok_msg "This repo will now be used for new Klipper installations!\n"
       fi
-        break;;
-      B|b)
+
+    elif [[ ${option} =~ ${back} ]]; then
       clear && print_header
       settings_menu
-        break;;
-      H|h)
+    elif [[ ${option} =~ ${help} ]]; then
       clear && print_header
       show_custom_klipper_repo_help
-        break;;
-      *)
-        error_msg "Invalid command!";;
-    esac
+    else
+      error_msg "Invalid command!"
+    fi
   done
+
   change_klipper_repo_menu
 }