Remove slack link in Somalian translation

[Roshanjossey]

🐞 Problem We're moving away from using slack

🎯 Goal Have no links to slack

💡 Possible solutions Remove link to slack in Somalian translation. You can find it in https://github.com/firstcontributions/first-contributions/blob/main/docs/translations/README.so.md?plain=1#L2

[!IMPORTANT] Please only address one issue in a PR. Let's make it possible for more people to solve issues here.

📋 Steps to solve the problem

• Comment below about what you've started working on.
• Add, commit, push your changes.
• Submit a pull request and add this in comments - 'Addresses #'
• Ask for reviews in comments section of pull request.
• Celebrate your contribution to this project. 🎉

[Rohanssutar]

Hey @Roshanjossey 👋, I noticed the bash commands in this README aren’t highlighted properly. There doesn’t seem to be an issue opened for it yet, Can I fix this issue?