Added six new programs to the list of open source programs

[Kaustav2410]

Summary

This PR adds six new open source programs to the existing list. The new programs included are:

1. Hyperledger Mentorship Program
2. Reinforcement Learning Open Source Fest by Microsoft
3. GitHub Octernship Program
4. Summer of Nix
5. 24 Pull Requests
6. FOSSASIA Internship Program

Details

• Hyperledger Mentorship Program: This program provides mentees with opportunities to learn about Hyperledger projects and work on them under the guidance of experienced mentors.
• Reinforcement Learning Open Source Fest by Microsoft: This program focuses on projects related to reinforcement learning and provides a platform for students and professionals to contribute to open source.
• GitHub Octernship Program: The GitHub Octernship Program connects students and early-career professionals with open source projects for internship opportunities.
• Summer of Nix: This program is aimed at promoting the use of the Nix package manager and NixOS through projects and contributions.
• 24 Pull Requests: An initiative encouraging developers to contribute to open source projects by submitting 24 pull requests in the month of December.
• FOSSASIA Internship Program: A program that connects students and developers with mentors to work on open source projects related to FOSSASIA.

Additional Notes

Please review the descriptions and ensure they align with the existing format and tone of the documentation. If there are any additional changes required, feel free to suggest or edit them.

Closes issue number #23

[Rupa-Rd]

Mention the issue number like 'closes #issuenumber'

[Kaustav2410]

Mention the issue number like 'closes #issuenumber'

Done