spiffs: move spiffsgen example with other storage related examples

docs/en/api-reference/storage/spiffs.rst

@@ -70,7 +70,7 @@ Optionally, user can opt to have the image automatically flashed together with t
 If FLASH_IN_PROJECT is not specified, the image is still generated,
 but user has to flash it manually using ``esptool.py``, ``parttool.py`` or a custom build system target.
 
-For an example, see :example:`examples/build_system/spiffsgen>`.
+For an example, see :example:`examples/storage/spiffsgen>`.
 
 
 mkspiffs

examples/storage/spiffsgen/example_test.py

@@ -15,7 +15,7 @@ except ImportError:
 @IDF.idf_example_test(env_tag='Example_WIFI')
 def test_examples_spiffsgen(env, extra_data):
     # Test with default build configurations
-    dut = env.get_dut('spiffsgen', 'examples/build_system/spiffsgen')
+    dut = env.get_dut('spiffsgen', 'examples/storage/spiffsgen')
     dut.start_app()
 
     base_dir = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'spiffs_image')