fix the typo in the prompt template of swelancer_agent

[BoxiYu]

There is a typo in the prompt template in swelancer_agent.py.

# Original line 119
The python code block is your means of interactign with the environment; write Python code to view files, edit files, and run commands. Do not leave any steps incomplete. You must implement all fixes yourself.

This pr is to change interactign into interacting.

# New line 119
The python code block is your means of interacting with the environment; write Python code to view files, edit files, and run commands. Do not leave any steps incomplete. You must implement all fixes yourself.

[samuelgm-openai]

Thank you.