Fix typos and improve clarity in installation guide

[Vruddhi18]

Description

This PR fixes typos and improves clarity in the installation guide.
• Corrected “setup” → “set up.”
• Simplified “follow these simple steps” → “follow these steps.”
• Fixed “computer visions scenarios” → “computer vision scenarios.”
• Changed “computationally heavy” → “computationally intensive.”
• Corrected “broswer” → “browser.”

These changes improve readability and make the documentation more professional.

Checklist:

• [ x] I have followed the contribution guidelines and code style for this project.
• [x ] This branch is created from staging and not master.
• [ x] This PR is being made to staging and not master.
• [x ] I will squash merge this PR into staging.
• I have added tests covering my contributions.
• [x ] I have updated the documentation accordingly.