Fix mistakes in the include path in `helix/rev2/local_features.mk`. (#16507)

```diff
  --- a/keyboards/helix/rev2/local_features.mk
  +++ b/keyboards/helix/rev2/local_features.mk
  @@ -6,7 +6,7 @@
   #

   KEYBOARD_LOCAL_FEATURES_MK :=
  --include $(strip $(HELIX_TOP_DIR)/pico/override_helix_options.mk) ## File ded  icated to maintenance
  +-include $(strip $(HELIX_TOP_DIR)/rev2/override_helix_options.mk) ## File dedicated to maintenance
  ```

keyboards/helix/rev2/local_features.mk

@@ -6,7 +6,7 @@
 #
 
 KEYBOARD_LOCAL_FEATURES_MK :=
--include $(strip $(HELIX_TOP_DIR)/pico/override_helix_options.mk) ## File dedicated to maintenance
+-include $(strip $(HELIX_TOP_DIR)/rev2/override_helix_options.mk) ## File dedicated to maintenance
 
 # Parse 'HELIX=xx,yy,zz' option
 ifneq ($(strip $(HELIX)),)

keyboards/helix/rev2/override_helix_options.mk

@@ -1,6 +1,8 @@
-$(info -------------------------)
-$(info override_helix_options.mk)
-$(info -------------------------)
+ifneq ($(strip $(HELIX)),)
+  $(info -------------------------)
+  $(info override_helix_options.mk)
+  $(info -------------------------)
+endif
 
 define HELIX_OVERRIDE_PARSE
       ifeq ($(strip $1),back)