Update README: Replace Old Communication Channels with New Ones

[AnmolSirola]

Is your feature request related to a problem? Please describe.

The current README for CodeLabz contains information about an outdated communication channel, namely the Glitter channel. This poses a challenge for new contributors who may attempt to join the deprecated channel instead of the current primary communication platform, which is the Slack channel.

Describe the solution you'd like

The purpose of this issue is to update the README, replacing references to the old Glitter channel with accurate details about the current Slack channel. This will streamline the onboarding process for new contributors and ensure they have the correct information to join the community.

[github-actions]

Hello 👋🏻 @AnmolSirola! Thankyou for creating an issue!

[github-actions]

This issue is stale because it has been open for 30 days with no activity.

[Hemu21]

I updated the readme file communication channel with new ones

[github-actions]

This issue is stale because it has been open for 30 days with no activity.

[github-actions]

This issue was closed because it has been inactive for 14 days since being marked as stale.