Update pip command

Dockerfile

@@ -8,7 +8,7 @@ WORKDIR /realtime_ai_character
 
 # Install Python dependencies
 COPY requirements.txt /realtime_ai_character
-RUN pip install -r /realtime_ai_character/requirements.txt
+RUN pip install --no-cache-dir --upgrade -r /realtime_ai_character/requirements.txt
 
 # Copy the project files
 COPY --chown=user ./ /realtime_ai_character