Update shell check (#7796)

Author: tremor021

misc/build.func

@@ -42,11 +42,11 @@ error_handler() {
   echo -e "\n$error_message\n"
 }
 
-# Check if the shell is using bash
+# Check if the current shell is using bash
 shell_check() {
-  if [[ "$(basename "$SHELL")" != "bash" ]]; then
+  if [[ "$(ps -p $$ -o comm=)" != "bash" ]]; then
     clear
-    msg_error "Your default shell is currently not set to Bash. To use these scripts, please switch to the Bash shell."
+    msg_error "Your default shell is not bash. Please report this to our github issues or discord."
     echo -e "\nExiting..."
     sleep 2
     exit