update explore path (#1176)

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### Summary

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- [ ] I have added integration tests to cover my changes.​
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CHANGELOG.md

@@ -14,6 +14,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   (<https://github.com/openvinotoolkit/datumaro/pull/1175>)
 
 ### Bug fixes
+- Correct explore path in the related document.
+  (<https://github.com/openvinotoolkit/datumaro/pull/1176>)
 - Fix errata in the voc document. Color values in the labelmap.txt should be separated by commas, not colons.
   (<https://github.com/openvinotoolkit/datumaro/pull/1162>)
 - Fix hyperlink errors in the document

docs/source/docs/level-up/intermediate_skills/10_data_exploration.rst

@@ -20,7 +20,7 @@ The Python example for the usage of explorer is described in :doc:`here <../../j
 
             from datumaro.components.dataset import Dataset
             from datumaro.components.environment import Environment
-            from datumaro.componenets.explorer import Explorer
+            from datumaro.components.algorithms.hash_key_inference.explorer import Explorer
 
             data_path = '/path/to/data'
 

notebooks/07_data_explorer.ipynb

@@ -26,7 +26,7 @@
     "# SPDX-License-Identifier: MIT\n",
     "\n",
     "import datumaro as dm\n",
-    "from datumaro.components.explorer import Explorer\n",
+    "from datumaro.components.algorithms.hash_key_inference.explorer import Explorer\n",
     "from datumaro.components.visualizer import Visualizer"
    ]
   },
@@ -46,7 +46,7 @@
    "metadata": {},
    "source": [
     "### Explore with COCO instance segmentation dataset\n",
-    "To use data exploration, we need to define hash for each dataset. So, set `save_hash` as `True`. The default value is `False`."
+    "To use data exploration, we need to define hash for each dataset. `Explorer` calculates the hash key automatically. If you want to re-use the calculated hash key, please set `save_hashkey_meta` as `True` when exporting the dataset. The default value is `False`."
    ]
   },
   {