fix: make cmd local

src/vs/workbench/contrib/terminal/browser/media/shellIntegration-bash.sh

@@ -275,6 +275,7 @@ __vsc_prompt_cmd_original() {
 	__vsc_restore_exit_code "${__vsc_status}"
 	# Evaluate the original PROMPT_COMMAND similarly to how bash would normally
 	# See https://unix.stackexchange.com/a/672843 for technique
+ 	local cmd
 	for cmd in "${__vsc_original_prompt_command[@]}"; do
 		eval "${cmd:-}"
 	done