Remove slack link in Gujarati Translation

[AasthaGohel]

🐞 Problem
The Slack link is present in the Gujarati translation of the README under the "Where to go from here" section. This link is outdated and should be removed or replaced, similar to other translations.

🎯 Goal
Remove the Slack link in the Gujarati README translation to keep it consistent with the main README and other translations.

💡 Possible solutions
Remove the Slack link from docs/translations/README.gu.md in the "Where to go from here" section.

📋 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 #<put issue number here>
• Ask for reviews in comments section of pull request.
• Celebrate your contribution to this project. 🎉

[lokhandelokeek11]

Hi, I’d like to work on this issue.
I will remove the outdated Slack link from docs/translations/README.gu.md as described.
Will raise a PR shortly.