docs: fix incorrect test file examples in testing guide (#2270)

Signed-off-by: Zainab Travadi <zainabtravadi421@gmail.com>

Author: ZainabTravadi

docs/sdk_developers/testing.md

@@ -84,7 +84,7 @@ hiero-sdk-python/
 │       └── account_create_transaction.py
 └── tests/
     └── unit/
-        └── test_account_create_transaction.py
+        └── account_create_transaction_test.py
 ```
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@@ -491,7 +491,7 @@ You may look at an already-created unit test file for better clarity:
 uv run pytest tests/unit/tokens/token_transfer_test.py -v
 
 # Run integration tests
-uv run pytest tests/integration/token_transfer_e2e_test.py -v
+uv run pytest tests/integration/transfer_transaction_e2e_test.py -v
 ```
 
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