Update Community Doc with Slack, meeting, and blog links

[PriteshKiri]

Description
The Community documentation needs small updates.

Location
website/docs/introduction/community.md

Proposed changes

1. In Join our Slack channel section
   Current text:
   Join here (#litmus on Kubernetes Slack) and connect with SREs and Chaos Engineering enthusiasts.
   Update to:
   Join here (#litmus and #litmus-dev on Kubernetes Slack) and connect with SREs and Chaos Engineering enthusiasts.

2. In Attend our meetings section
   Update the form link for "LitmusChaos Meetings invite form" to - https://forms.gle/12c2edizCpQcHTtEA

3. In Read blogs by the Litmus community and contributors section
   Add a hyperlink to the Litmus blog page.

[shresthashim]

Hi, I would like to work on this issue can you assign it to me

[DHRUVKHANDELWAL00]

Hi @PriteshKiri , Can you review #368

[PriteshKiri]

Hey @DHRUVKHANDELWAL00
Thank you so much for your contribution! 🙌
Please keep an eye on your PR, as we may add some review comments if needed before merging it.

[PriteshKiri]

Hey @shresthashim
Thank you for your interest in contributing! We have assigned you to another issue and are looking forward to your contributions there :)