Update GPIO header inclusion in llcc68 template file

- Replaced the inclusion of `<driver/gpio.h>` with `<soc/gpio_num.h>` to align with the updated GPIO handling in the llcc68 component.

inc/template/app_const_llcc68_template.hpp

@@ -11,7 +11,7 @@
 #error "this file is a template; copy it to `app_const_llcc68.hpp` and modify the values; then remove this error"
 #endif
 
-#include <driver/gpio.h>
+#include <soc/gpio_num.h>
 namespace app::driver::llcc68 {
 /// @brief special pin number for no connection
 constexpr auto NC_PIN = GPIO_NUM_NC;