Update llm_robotics.rst

[girishsmurthyIntel]

Make sure to upgrade the pip package manager to the latest version for the specific Python interpreter being used. This was required to resolve some errors related to the requirements installation node count mismatch.

Description

While working with virtual environments, it is required to upgrade the pip package manager to the latest version for the specific Python interpreter being used. This was identified while resolving some errors related to the requirements installation node count mismatch.

Fixes # (issue)

Any Newly Introduced Dependencies

NA

How Has This Been Tested?

Include the step (python -m pip install --upgrade pip), before $ pip install -r requirement.txt.
Under the section, LLM and vision models setup, to Setup a virtual environment for application, step 1: Install the pip packages for LLM

Checklist:

• I agree to use the APACHE-2.0 license for my code changes.
• I have not introduced any 3rd party components incompatible with APACHE-2.0.
• I have not included any company confidential information, trade secret, password or security token.
• I have performed a self-review of my code.