Re-enable littlefs json manifest

This works locally again :)
Not sure what changed

bin/platformio-custom.py

@@ -301,8 +301,7 @@ if not should_skip_manifest and platform.name == "espressif32":
     target_lfs = env.DataToBin(
         join("$BUILD_DIR", "${ESP32_FS_IMAGE_NAME}"), "$PROJECT_DATA_DIR"
     )
-    # prepend the littlefs target to the mtjson dependencies
-    # mtjson_deps.insert(0, target_lfs)
+    mtjson_deps.append(target_lfs)
 
 if should_skip_manifest:
     def skip_manifest(source, target, env):