[Keyboard] Update BM68RGB Caps Lock Backlight status indication (#13497)

Co-authored-by: Drashna Jael're <drashna@live.com>

keyboards/kprepublic/bm68hsrgb/bm68hsrgb.c

@@ -41,4 +41,12 @@ led_config_t g_led_config = { {
     1, 1, 1,          4,       1, 1, 1, 1, 1, 1,  // Ctrl, GUI, Alt, Space, RAlt, FN, Ctrl, Left, Down, Right
     2, 2, 2, 2, 2, 2  // UNDERGLOW
 } };
+
+//CAPS backlight
+__attribute__ ((weak))
+void rgb_matrix_indicators_user(void) {
+    if (host_keyboard_led_state().caps_lock) {
+        rgb_matrix_set_color(30, 0xFF, 0xFF, 0xFF);
+    }
+}
 #endif