fix(docs): correct typos and clarify docstrings in react_gemini_prompting.ipynb

[Rahul-Lashkari]

Description of the change

Corrects several minor typos and improves clarity within site/en/docs/react_gemini_prompting.ipynb.

Changes include fixing misspellings in docstrings (Perfoms, lastest) and text (immitate), and clarifying a docstring argument description (name to -> name of).

Motivation

To enhance the readability, accuracy, and overall quality of the documentation notebook.

Type of change

Documentation

Checklist

• [x] I have performed a self-review of my code.
• [x] I have added detailed comments to my code where applicable.
• [x] I have verified that my change does not break existing code.
• [x] My PR is based on the latest changes of the main branch (if unsure, please run git pull --rebase upstream main).
• [x] I am familiar with the Google Style Guide for the language I have coded in.
• [x] I have read through the Contributing Guide and signed the Contributor License Agreement.