Updating the calendar and the Teams link in the README file

[sindhushiv]

Proposed changes

We have created a new Teams invite and calendar event for the NGF community meeting. We are updating the README file to reflect this information correctly.

Closes #ISSUE

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

Release notes

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.66%. Comparing base (4b85007) to head (4bb2893).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4057      +/-   ##
==========================================
- Coverage   86.69%   86.66%   -0.03%     
==========================================
  Files         128      128              
  Lines       16758    16758              
  Branches       62       62              
==========================================
- Hits        14528    14524       -4     
- Misses       2045     2047       +2     
- Partials      185      187       +2     

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