Rename module etdb to inspector (#908)

Summary:

Etdb directory was renamed, but because the Example usage is static, it didn't get updated

Reviewed By: Jack-Khuu

Differential Revision: D50282527

Author: Olivia-liu

docs/source/sdk-inspector.rst

@@ -26,21 +26,23 @@ Inspector Methods
 Constructor
 ~~~~~~~~~~~
 
-.. autofunction:: sdk.inspector.inspector.Inspector.__init__
+.. automodule:: sdk.Inspector
+.. autofunction:: __init__
 
 **Example Usage:**
 
 .. code:: python
 
-    from executorch.sdk.etdb.inspector import Inspector
+    from executorch.sdk import Inspector
 
     inspector = Inspector(etdump_path="/path/to/etdump.etdp", etrecord_path="/path/to/etrecord.bin")
 
 
 print_data_tabular
 ~~~~~~~~~~~~~~~~~~
 
-.. autofunction:: sdk.inspector.inspector.Inspector.print_data_tabular
+.. automodule:: sdk.Inspector
+.. autofunction:: print_data_tabular
 
 .. _example-usage-1:
 
@@ -56,7 +58,8 @@ print_data_tabular
 find_total_for_module
 ~~~~~~~~~~~~~~~~~~~~~
 
-.. autofunction:: sdk.inspector.inspector.Inspector.find_total_for_module
+.. automodule:: sdk.Inspector
+.. autofunction:: find_total_for_module
 
 .. _example-usage-2:
 
@@ -74,7 +77,8 @@ find_total_for_module
 get_exported_program
 ~~~~~~~~~~~~~~~~~~~~
 
-.. autofunction:: sdk.inspector.inspector.Inspector.get_exported_program
+.. automodule:: sdk.Inspector
+.. autofunction:: get_exported_program
 
 .. _example-usage-3: