Renamed 'Introduction' to 'Introduction.md' for better consistency

[Shubhf]

This pull request addresses a minor but important file naming issue within the "Cloud_providers/Azure" directory. The file previously named "Introduction file" has been renamed to "Introduction.md" to follow standard markdown file conventions and improve the readability of the repository.

Changes:

• Renamed Cloud_providers/Azure/Introduction file to Cloud_providers/Azure/Introduction.md.

Reason for Change:

• Markdown files typically end with the .md extension, which allows for proper formatting and display on GitHub.

• This change enhances the professionalism and structure of the repository, ensuring that files are more easily identifiable for users and contributors.

Hacktoberfest 2024 Contribution: This change is part of my participation in Hacktoberfest 2024, an event that encourages open-source contributions. I hope this improvement makes the repository more user-friendly and structured for future collaborators.

Looking forward to your feedback and possible merge. Thank you!