add num lock indicator functionality to hineybush/h10 (#10100)

* add num lock indicator functionality to h10

* Update keyboards/hineybush/h10/h10.c

keyboards/hineybush/h10/h10.c

@@ -20,10 +20,15 @@
 // You can leave any or all of these undefined.
 // These are only required if you want to perform custom actions.
 
-/*
-bool led_update_kb(led_t led_state) {
-    // placeholder for LED indicator added to next revision
-
-    return led_update_user(led_state);
+void matrix_init_kb(void) {
+    // put your keyboard start-up code here
+    // runs once when the firmware starts up
+   	setPinOutput(F7);
+}
+
+bool led_update_kb(led_t led_state) {
+    if(led_update_user(led_state)) {
+        writePin(F7, !led_state.num_lock);
+    }
+    return true;
 }
-*/