Fix duplicated .py extension in test command for llama-server

[xiaobing318]

Problem Description

The current test command for the llama-server object in the project has a duplicated file extension, which prevents the test script from correctly locating the test file. The original command was:

./tests.sh unit/test_chat_completion.py.py -v -x

The correct file name should be unit/test_chat_completion.py.

Proposed Solution

This PR corrects the test command by removing the extra .py extension. The updated command is:

./tests.sh unit/test_chat_completion.py -v -x

This fix ensures that the tests are executed as expected without encountering file name errors.

Testing

• Ran the updated command locally to confirm that the test file is correctly found and executed.
• Verified that the change does not affect other parts of the test suite.

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